SAM: Security Specification

Overview

This document defines the comprehensive security architecture for SAM, designed to provide robust protection while maintaining the user-friendly interface and transparent operation principles established in the SAM specifications. Security is implemented as an invisible layer that protects users without requiring technical knowledge.

Core Security Principles

1. Invisible Protection

• Zero User Configuration: Security works automatically without user setup
• Transparent Operation: Users aren't burdened with security decisions
• Smart Defaults: Maximum protection enabled by default
• Progressive Security: Advanced options available when needed

2. Privacy by Design

• Local-First Processing: Sensitive operations performed locally when possible
• Minimal Data Collection: Only collect data necessary for functionality
• User Control: Clear controls for data sharing and storage
• Encryption Everywhere: All data encrypted at rest and in transit

3. Defense in Depth

• Multiple Security Layers: No single point of failure
• Proactive Protection: Prevent attacks before they occur
• Adaptive Response: Security measures adjust to threat levels
• Continuous Monitoring: Real-time threat detection and response

Security Architecture

Security Manager System

class SecurityManager: ObservableObject {
    @Published var securityStatus: SecurityStatus = .protected
    @Published var threatLevel: ThreatLevel = .low
    @Published var activeProtections: [SecurityProtection] = []
    
    private let encryptionManager: EncryptionManager
    private let accessControlManager: AccessControlManager
    private let threatDetectionEngine: ThreatDetectionEngine
    private let privacyManager: PrivacyManager
    
    func initialize() async throws {
        // Initialize security systems silently
        try await setupEncryption()
        try await configureAccessControls()
        try await startThreatMonitoring()
        try await enablePrivacyProtections()
        
        // Update security status
        await updateSecurityStatus()
    }
    
    private func setupEncryption() async throws {
        // Set up encryption for all data automatically
        try await encryptionManager.initializeEncryption()
        
        // Enable database encryption
        try await encryptionManager.enableDatabaseEncryption()
        
        // Configure API communication encryption
        try await encryptionManager.configureAPIEncryption()
    }
    
    private func configureAccessControls() async throws {
        // Set up automatic permission management
        try await accessControlManager.initializePermissionSystem()
        
        // Configure tool access controls
        try await accessControlManager.setupToolPermissions()
        
        // Enable sandbox security
        try await accessControlManager.enableSandboxSecurity()
    }
    
    private func startThreatMonitoring() async throws {
        // Begin monitoring for threats
        try await threatDetectionEngine.startMonitoring()
        
        // Set up behavioral analysis
        try await threatDetectionEngine.enableBehavioralAnalysis()
        
        // Configure anomaly detection
        try await threatDetectionEngine.setupAnomalyDetection()
    }
    
    private func enablePrivacyProtections() async throws {
        // Configure data minimization
        try await privacyManager.enableDataMinimization()
        
        // Set up local processing preferences
        try await privacyManager.configureLocalProcessing()
        
        // Enable data retention policies
        try await privacyManager.setupRetentionPolicies()
    }
}

enum SecurityStatus {
    case protected      // All systems secure
    case monitoring     // Actively monitoring threats
    case responding     // Responding to security event
    case compromised    // Security breach detected
}

enum ThreatLevel {
    case low           // Normal operation
    case elevated      // Potential threats detected
    case high          // Active threats present
    case critical      // Immediate action required
}

Data Protection

Encryption System

class EncryptionManager {
    private let keyManager: KeyManager
    private let databaseEncryption: DatabaseEncryption
    private let communicationEncryption: CommunicationEncryption
    
    func initializeEncryption() async throws {
        // Generate or retrieve master encryption key
        let masterKey = try await keyManager.getMasterKey()
        
        // Initialize encryption systems
        try await databaseEncryption.initialize(with: masterKey)
        try await communicationEncryption.initialize(with: masterKey)
        
        // Test encryption functionality
        try await validateEncryptionSystems()
    }
    
    func encryptSensitiveData(_ data: Data, classification: DataClassification) async throws -> EncryptedData {
        let encryptionLevel = getEncryptionLevel(for: classification)
        
        switch encryptionLevel {
        case .standard:
            return try await standardEncrypt(data)
        case .enhanced:
            return try await enhancedEncrypt(data)
        case .maximum:
            return try await maximumEncrypt(data)
        }
    }
    
    private func standardEncrypt(_ data: Data) async throws -> EncryptedData {
        // AES-256-GCM encryption for standard data
        let key = try await keyManager.getDataEncryptionKey()
        let encryptedData = try AES.GCM.seal(data, using: key)
        
        return EncryptedData(
            data: encryptedData.combined!,
            algorithm: .aes256gcm,
            keyReference: key.keyID
        )
    }
    
    private func enhancedEncrypt(_ data: Data) async throws -> EncryptedData {
        // Double encryption for enhanced security
        let standardEncrypted = try await standardEncrypt(data)
        return try await standardEncrypt(standardEncrypted.data)
    }
    
    private func maximumEncrypt(_ data: Data) async throws -> EncryptedData {
        // Multi-layer encryption with key splitting
        let encryptionKey1 = try await keyManager.generateEphemeralKey()
        let encryptionKey2 = try await keyManager.generateEphemeralKey()
        
        // First layer encryption
        let firstLayer = try AES.GCM.seal(data, using: encryptionKey1)
        
        // Second layer encryption with different key
        let secondLayer = try AES.GCM.seal(firstLayer.combined!, using: encryptionKey2)
        
        // Store keys separately
        try await keyManager.storeKeySecurely(encryptionKey1, reference: "max_enc_key1")
        try await keyManager.storeKeySecurely(encryptionKey2, reference: "max_enc_key2")
        
        return EncryptedData(
            data: secondLayer.combined!,
            algorithm: .multiLayerAES,
            keyReference: "max_enc_keys"
        )
    }
}

enum DataClassification {
    case public         // No encryption needed
    case internal       // Standard encryption
    case confidential   // Enhanced encryption
    case restricted     // Maximum encryption
}

struct EncryptedData {
    let data: Data
    let algorithm: EncryptionAlgorithm
    let keyReference: String
    let timestamp: Date = Date()
}

enum EncryptionAlgorithm: String {
    case aes256gcm = "AES-256-GCM"
    case multiLayerAES = "Multi-Layer-AES"
    case postQuantum = "Post-Quantum"
}

Secure Storage

class SecureStorageManager {
    private let keychain: KeychainManager
    private let encryptedFileSystem: EncryptedFileSystem
    private let secureDatabase: SecureDatabase
    
    func storeSecurely<T: Codable>(_ item: T, identifier: String, classification: DataClassification) async throws {
        let data = try JSONEncoder().encode(item)
        let classifiedData = ClassifiedData(data: data, classification: classification)
        
        switch classification {
        case .public:
            try await storeInUserDefaults(classifiedData, identifier: identifier)
        case .internal:
            try await storeInEncryptedDatabase(classifiedData, identifier: identifier)
        case .confidential:
            try await storeInEncryptedFileSystem(classifiedData, identifier: identifier)
        case .restricted:
            try await storeInKeychain(classifiedData, identifier: identifier)
        }
    }
    
    func retrieveSecurely<T: Codable>(_ type: T.Type, identifier: String) async throws -> T? {
        // Try different storage locations based on security level
        if let data = try await retrieveFromKeychain(identifier: identifier) {
            return try JSONDecoder().decode(type, from: data)
        }
        
        if let data = try await retrieveFromEncryptedFileSystem(identifier: identifier) {
            return try JSONDecoder().decode(type, from: data)
        }
        
        if let data = try await retrieveFromEncryptedDatabase(identifier: identifier) {
            return try JSONDecoder().decode(type, from: data)
        }
        
        if let data = try await retrieveFromUserDefaults(identifier: identifier) {
            return try JSONDecoder().decode(type, from: data)
        }
        
        return nil
    }
    
    private func storeInKeychain(_ data: ClassifiedData, identifier: String) async throws {
        // Use Keychain for most sensitive data
        try await keychain.store(data.data, identifier: identifier)
    }
    
    private func storeInEncryptedFileSystem(_ data: ClassifiedData, identifier: String) async throws {
        // Use encrypted file system for confidential data
        try await encryptedFileSystem.write(data.data, to: identifier)
    }
    
    private func storeInEncryptedDatabase(_ data: ClassifiedData, identifier: String) async throws {
        // Use encrypted database for internal data
        try await secureDatabase.save(data.data, identifier: identifier)
    }
    
    private func storeInUserDefaults(_ data: ClassifiedData, identifier: String) async throws {
        // Use standard UserDefaults for public data
        UserDefaults.standard.set(data.data, forKey: identifier)
    }
}

struct ClassifiedData {
    let data: Data
    let classification: DataClassification
    let timestamp: Date = Date()
}

Access Control System

Permission Management

class AccessControlManager {
    private let permissionEngine: PermissionEngine
    private let toolSecurityManager: ToolSecurityManager
    private let sandboxManager: SandboxManager
    
    func initializePermissionSystem() async throws {
        // Set up permission defaults
        try await configureDefaultPermissions()
        
        // Initialize tool security
        try await toolSecurityManager.initialize()
        
        // Set up sandbox environment
        try await sandboxManager.createSecureSandbox()
    }
    
    func checkPermission(for operation: SecurityOperation, context: OperationContext) async throws -> PermissionResult {
        // Analyze operation security requirements
        let securityAnalysis = await analyzeOperationSecurity(operation, context: context)
        
        // Check if operation is automatically allowed
        if securityAnalysis.riskLevel == .minimal {
            return PermissionResult.granted(reason: .automaticallyApproved)
        }
        
        // Check user preferences for this type of operation
        let userPreference = await getUserPermissionPreference(for: operation.category)
        
        switch userPreference {
        case .alwaysAllow:
            return PermissionResult.granted(reason: .userPreference)
        case .alwaysDeny:
            return PermissionResult.denied(reason: .userPreference)
        case .askEachTime:
            return await requestUserPermission(for: operation, analysis: securityAnalysis)
        case .automatic:
            return await makeAutomaticDecision(for: operation, analysis: securityAnalysis)
        }
    }
    
    private func makeAutomaticDecision(for operation: SecurityOperation, analysis: SecurityAnalysis) async -> PermissionResult {
        // Use intelligent decision making for user-friendly security
        let trustScore = calculateTrustScore(operation: operation, analysis: analysis)
        
        if trustScore >= 0.8 {
            return PermissionResult.granted(reason: .highTrust)
        } else if trustScore >= 0.5 {
            return PermissionResult.grantedWithMonitoring(reason: .moderateTrust)
        } else {
            return await requestUserPermissionWithExplanation(for: operation, analysis: analysis)
        }
    }
    
    private func requestUserPermissionWithExplanation(for operation: SecurityOperation, analysis: SecurityAnalysis) async -> PermissionResult {
        // Present user-friendly permission request
        let request = UserPermissionRequest(
            title: operation.userFriendlyTitle,
            description: operation.userFriendlyDescription,
            riskExplanation: analysis.userFriendlyRiskExplanation,
            suggestedAction: analysis.suggestedUserAction,
            allowedActions: ["Allow Once", "Allow Always", "Deny", "Learn More"]
        )
        
        let userResponse = await presentPermissionRequest(request)
        
        switch userResponse {
        case "Allow Once":
            return PermissionResult.granted(reason: .userApproval)
        case "Allow Always":
            await updateUserPreference(for: operation.category, preference: .alwaysAllow)
            return PermissionResult.granted(reason: .userApproval)
        case "Deny":
            return PermissionResult.denied(reason: .userDenial)
        case "Learn More":
            await showSecurityEducation(for: operation)
            return await requestUserPermissionWithExplanation(for: operation, analysis: analysis)
        default:
            return PermissionResult.denied(reason: .unknownResponse)
        }
    }
}

enum PermissionResult {
    case granted(reason: PermissionReason)
    case denied(reason: PermissionReason)
    case grantedWithMonitoring(reason: PermissionReason)
    case conditional(conditions: [SecurityCondition])
}

enum PermissionReason {
    case automaticallyApproved
    case userPreference
    case userApproval
    case userDenial
    case highTrust
    case moderateTrust
    case unknownResponse
}

struct SecurityOperation {
    let id: String
    let category: OperationCategory
    let userFriendlyTitle: String
    let userFriendlyDescription: String
    let requiredPermissions: [Permission]
    let riskLevel: RiskLevel
}

enum OperationCategory {
    case fileAccess
    case networkAccess
    case systemIntegration
    case dataProcessing
    case externalCommunication
}

Tool Security Framework

class ToolSecurityManager {
    private let toolRegistry: [String: ToolSecurityProfile] = [:]
    private let executionMonitor: ToolExecutionMonitor
    private let sandboxManager: SandboxManager
    
    func validateToolExecution(_ tool: MCPTool, parameters: [String: Any]) async throws -> ValidationResult {
        // Get security profile for tool
        guard let profile = toolRegistry[tool.identifier] else {
            throw SecurityError.unknownTool(tool.identifier)
        }
        
        // Validate parameters for security risks
        let parameterValidation = try await validateParameters(parameters, profile: profile)
        guard parameterValidation.isValid else {
            throw SecurityError.invalidParameters(parameterValidation.issues)
        }
        
        // Check execution context
        let contextValidation = try await validateExecutionContext(profile: profile)
        guard contextValidation.isValid else {
            throw SecurityError.invalidContext(contextValidation.issues)
        }
        
        return ValidationResult.valid
    }
    
    func executeToolSecurely(_ tool: MCPTool, parameters: [String: Any]) async throws -> ToolResult {
        // Validate execution first
        try await validateToolExecution(tool, parameters: parameters)
        
        // Get security profile
        let profile = toolRegistry[tool.identifier]!
        
        // Create secure execution environment
        let sandbox = try await sandboxManager.createToolSandbox(profile: profile)
        
        // Execute with monitoring
        let result = try await executionMonitor.executeWithMonitoring(tool, parameters: parameters, sandbox: sandbox)
        
        // Validate result before returning
        try await validateToolResult(result, profile: profile)
        
        return result
    }
    
    private func validateParameters(_ parameters: [String: Any], profile: ToolSecurityProfile) async throws -> ParameterValidation {
        var issues: [SecurityIssue] = []
        
        for (key, value) in parameters {
            // Check for potentially dangerous values
            if let stringValue = value as? String {
                if containsDangerousContent(stringValue) {
                    issues.append(SecurityIssue.dangerousContent(parameter: key, content: stringValue))
                }
                
                if exceedsLengthLimit(stringValue, profile: profile) {
                    issues.append(SecurityIssue.parameterTooLong(parameter: key, length: stringValue.count))
                }
            }
            
            // Check parameter against allowed types
            if !profile.allowedParameterTypes[key]?.contains(type(of: value)) ?? false {
                issues.append(SecurityIssue.invalidParameterType(parameter: key, expectedType: profile.allowedParameterTypes[key]?.description ?? "unknown"))
            }
        }
        
        return ParameterValidation(isValid: issues.isEmpty, issues: issues)
    }
    
    private func containsDangerousContent(_ content: String) -> Bool {
        let dangerousPatterns = [
            #"<script.*?>.*?</script>"#,
            #"javascript:"#,
            #"data:text/html"#,
            #"eval\s*\("#,
            #"Function\s*\("#,
            #"\.\./.*\.\."#,  // Path traversal
            #"rm\s+-rf"#,      // Dangerous commands
            #"sudo\s+"#,
            #"chmod\s+777"#
        ]
        
        for pattern in dangerousPatterns {
            if content.range(of: pattern, options: .regularExpression) != nil {
                return true
            }
        }
        
        return false
    }
}

struct ToolSecurityProfile {
    let toolIdentifier: String
    let riskLevel: RiskLevel
    let allowedParameterTypes: [String: [Any.Type]]
    let maxParameterLength: [String: Int]
    let requiredPermissions: [Permission]
    let sandboxRequirements: SandboxRequirements
    let executionTimeLimit: TimeInterval
    let memoryLimit: Int
    let networkAccessAllowed: Bool
    let fileSystemAccessLevel: FileSystemAccessLevel
}

enum RiskLevel {
    case minimal    // Safe operations, no confirmation needed
    case low        // Minor risks, automatic approval
    case moderate   // Some risks, smart approval or user confirmation
    case high       // Significant risks, user confirmation required
    case critical   // Dangerous operations, multiple confirmations required
}

enum FileSystemAccessLevel {
    case none           // No file system access
    case readOnly       // Read-only access to specific directories
    case restricted     // Limited write access to safe directories
    case full           // Full file system access (requires explicit permission)
}

Threat Detection and Response

Behavioral Analysis Engine

class BehavioralAnalysisEngine {
    private let normalBehaviorProfile: BehaviorProfile
    private let anomalyDetector: AnomalyDetector
    private let responseEngine: ThreatResponseEngine
    
    func analyzeBehavior(_ activity: UserActivity) async -> BehaviorAnalysis {
        // Build behavioral profile
        let currentProfile = buildBehaviorProfile(from: activity)
        
        // Compare with normal behavior
        let deviations = compareWithNormalBehavior(currentProfile, normal: normalBehaviorProfile)
        
        // Assess threat level
        let threatAssessment = assessThreatLevel(deviations: deviations)
        
        // Generate analysis result
        return BehaviorAnalysis(
            activity: activity,
            profile: currentProfile,
            deviations: deviations,
            threatLevel: threatAssessment.level,
            confidence: threatAssessment.confidence,
            recommendedActions: threatAssessment.recommendedActions
        )
    }
    
    func detectAnomalies(_ activity: UserActivity) async -> [SecurityAnomaly] {
        var anomalies: [SecurityAnomaly] = []
        
        // Check for unusual access patterns
        if let accessAnomaly = detectUnusualAccess(activity) {
            anomalies.append(accessAnomaly)
        }
        
        // Check for suspicious tool usage
        if let toolAnomaly = detectSuspiciousToolUsage(activity) {
            anomalies.append(toolAnomaly)
        }
        
        // Check for data exfiltration patterns
        if let dataAnomaly = detectDataExfiltrationPatterns(activity) {
            anomalies.append(dataAnomaly)
        }
        
        // Check for unusual network activity
        if let networkAnomaly = detectUnusualNetworkActivity(activity) {
            anomalies.append(networkAnomaly)
        }
        
        return anomalies
    }
    
    private func detectUnusualAccess(_ activity: UserActivity) -> SecurityAnomaly? {
        // Check for access outside normal hours
        let currentHour = Calendar.current.component(.hour, from: Date())
        let normalHours = normalBehaviorProfile.activeHours
        
        if !normalHours.contains(currentHour) {
            return SecurityAnomaly(
                type: .unusualAccessTime,
                severity: .medium,
                description: "Access outside normal hours (\(currentHour):00)",
                affectedResource: "System Access",
                timestamp: Date()
            )
        }
        
        // Check for unusual location (if available)
        if let location = activity.location,
           !isLocationWithinNormalRange(location) {
            return SecurityAnomaly(
                type: .unusualLocation,
                severity: .high,
                description: "Access from unusual location",
                affectedResource: "System Access",
                timestamp: Date()
            )
        }
        
        return nil
    }
    
    private func detectSuspiciousToolUsage(_ activity: UserActivity) -> SecurityAnomaly? {
        // Check for rapid tool execution
        let recentToolUses = activity.toolUsages.filter { usage in
            Date().timeIntervalSince(usage.timestamp) < 60 // Last minute
        }
        
        if recentToolUses.count > 10 {
            return SecurityAnomaly(
                type: .rapidToolExecution,
                severity: .high,
                description: "Unusually rapid tool execution (\(recentToolUses.count) in 1 minute)",
                affectedResource: "Tool System",
                timestamp: Date()
            )
        }
        
        // Check for use of dangerous tools
        let dangerousTools = recentToolUses.filter { usage in
            usage.tool.riskLevel == .high || usage.tool.riskLevel == .critical
        }
        
        if dangerousTools.count > 3 {
            return SecurityAnomaly(
                type: .dangerousToolUsage,
                severity: .critical,
                description: "Multiple dangerous tool executions",
                affectedResource: "Tool System",
                timestamp: Date()
            )
        }
        
        return nil
    }
}

struct SecurityAnomaly {
    let type: AnomalyType
    let severity: SeverityLevel
    let description: String
    let affectedResource: String
    let timestamp: Date
    let confidence: Double = 0.85
}

enum AnomalyType {
    case unusualAccessTime
    case unusualLocation
    case rapidToolExecution
    case dangerousToolUsage
    case dataExfiltration
    case networkAnomaly
    case authenticationAnomaly
}

enum SeverityLevel {
    case low
    case medium
    case high
    case critical
}

Automated Response System

class AutomatedResponseSystem {
    private let responseStrategies: [AnomalyType: ResponseStrategy] = [:]
    private let quarantineManager: QuarantineManager
    private let notificationManager: SecurityNotificationManager
    
    func respondToThreat(_ threat: SecurityThreat) async throws {
        // Determine response strategy
        let strategy = selectResponseStrategy(for: threat)
        
        // Execute immediate response
        try await executeImmediateResponse(strategy, threat: threat)
        
        // Monitor for continued threats
        await monitorForContinuedThreats(threat)
        
        // Learn from the incident
        await updateThreatResponse(based: threat, strategy: strategy)
    }
    
    private func executeImmediateResponse(_ strategy: ResponseStrategy, threat: SecurityThreat) async throws {
        switch strategy.action {
        case .monitor:
            await enableEnhancedMonitoring(for: threat)
            
        case .restrict:
            try await restrictAccess(for: threat)
            
        case .quarantine:
            try await quarantineThreat(threat)
            
        case .block:
            try await blockThreat(threat)
            
        case .notify:
            await notifyUser(of: threat, strategy: strategy)
            
        case .escalate:
            await escalateToHumanReview(threat)
        }
    }
    
    private func quarantineThreat(_ threat: SecurityThreat) async throws {
        switch threat.type {
        case .suspiciousFile(let filePath):
            try await quarantineManager.quarantineFile(filePath)
            
        case .maliciousProcess(let processID):
            try await quarantineManager.terminateProcess(processID)
            
        case .suspiciousNetwork(let connection):
            try await quarantineManager.blockNetworkConnection(connection)
            
        case .compromisedTool(let toolID):
            try await quarantineManager.disableTool(toolID)
        }
    }
    
    private func notifyUser(of threat: SecurityThreat, strategy: ResponseStrategy) async {
        let notification = SecurityNotification(
            title: threat.userFriendlyTitle,
            message: threat.userFriendlyDescription,
            severity: threat.severity,
            actionsTaken: strategy.actionDescriptions,
            recommendedUserActions: strategy.userRecommendations
        )
        
        await notificationManager.presentNotification(notification)
    }
}

struct SecurityThreat {
    let id: UUID = UUID()
    let type: ThreatType
    let severity: SeverityLevel
    let source: ThreatSource
    let userFriendlyTitle: String
    let userFriendlyDescription: String
    let technicalDetails: String
    let timestamp: Date = Date()
}

enum ThreatType {
    case suspiciousFile(String)
    case maliciousProcess(Int)
    case suspiciousNetwork(NetworkConnection)
    case compromisedTool(String)
    case dataExfiltration(DataExfiltrationDetails)
    case authenticationBreach(AuthenticationDetails)
}

struct ResponseStrategy {
    let action: ResponseAction
    let actionDescriptions: [String]
    let userRecommendations: [String]
    let escalationThreshold: TimeInterval
}

enum ResponseAction {
    case monitor
    case restrict
    case quarantine
    case block
    case notify
    case escalate
}

Privacy Protection

Data Minimization Engine

class DataMinimizationEngine {
    private let dataClassifier: DataClassifier
    private let retentionPolicyManager: RetentionPolicyManager
    private let anonymizationEngine: AnonymizationEngine
    
    func minimizeDataCollection(_ data: CollectedData) async throws -> MinimizedData {
        // Classify data sensitivity
        let classification = await dataClassifier.classifyData(data)
        
        // Apply data minimization rules
        let minimized = try await applyMinimizationRules(data, classification: classification)
        
        // Apply retention policies
        let withRetention = try await retentionPolicyManager.applyRetentionPolicy(minimized)
        
        return withRetention
    }
    
    func anonymizeData(_ data: PersonalData) async throws -> AnonymizedData {
        // Identify personal identifiers
        let identifiers = await identifyPersonalIdentifiers(data)
        
        // Apply anonymization techniques
        let anonymized = try await anonymizationEngine.anonymize(data, identifiers: identifiers)
        
        // Validate anonymization effectiveness
        try await validateAnonymization(original: data, anonymized: anonymized)
        
        return anonymized
    }
    
    private func applyMinimizationRules(_ data: CollectedData, classification: DataClassification) async throws -> MinimizedData {
        var minimized = data
        
        switch classification.sensitivityLevel {
        case .public:
            // No minimization needed
            break
            
        case .internal:
            // Remove detailed metadata
            minimized = removeDetailedMetadata(minimized)
            
        case .confidential:
            // Remove personal identifiers
            minimized = removePersonalIdentifiers(minimized)
            
        case .restricted:
            // Encrypt and minimize
            minimized = try await encryptAndMinimize(minimized)
        }
        
        return MinimizedData(
            data: minimized,
            originalSize: data.size,
            minimizedSize: minimized.size,
            reductionRatio: Double(minimized.size) / Double(data.size)
        )
    }
    
    private func identifyPersonalIdentifiers(_ data: PersonalData) async -> [PersonalIdentifier] {
        var identifiers: [PersonalIdentifier] = []
        
        // Email addresses
        let emailRegex = #"[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,}"#
        identifiers.append(contentsOf: findMatches(in: data.content, pattern: emailRegex, type: .email))
        
        // Phone numbers
        let phoneRegex = #"\b\d{3}[-.]?\d{3}[-.]?\d{4}\b"#
        identifiers.append(contentsOf: findMatches(in: data.content, pattern: phoneRegex, type: .phone))
        
        // Credit card numbers
        let cardRegex = #"\b\d{4}[-\s]?\d{4}[-\s]?\d{4}[-\s]?\d{4}\b"#
        identifiers.append(contentsOf: findMatches(in: data.content, pattern: cardRegex, type: .creditCard))
        
        // Social security numbers
        let ssnRegex = #"\b\d{3}-\d{2}-\d{4}\b"#
        identifiers.append(contentsOf: findMatches(in: data.content, pattern: ssnRegex, type: .ssn))
        
        return identifiers
    }
}

struct PersonalIdentifier {
    let type: IdentifierType
    let value: String
    let location: Range<String.Index>
    let confidence: Double
}

enum IdentifierType {
    case email
    case phone
    case creditCard
    case ssn
    case ipAddress
    case macAddress
    case name
    case address
}

Local Processing Preference Engine

class LocalProcessingEngine {
    private let mlxManager: MLXModelManager
    private let capabilityAssessment: LocalCapabilityAssessment
    private let privacyPolicyManager: PrivacyPolicyManager
    
    func determineProcessingLocation(for request: ProcessingRequest) async -> ProcessingDecision {
        // Assess local capabilities
        let localCapabilities = await capabilityAssessment.assessLocalCapabilities(for: request)
        
        // Check privacy requirements
        let privacyRequirements = await privacyPolicyManager.getPrivacyRequirements(for: request)
        
        // Check user preferences
        let userPreferences = await getUserProcessingPreferences(for: request.type)
        
        // Make decision based on multiple factors
        return await makeProcessingDecision(
            capabilities: localCapabilities,
            requirements: privacyRequirements,
            preferences: userPreferences,
            request: request
        )
    }
    
    private func makeProcessingDecision(
        capabilities: LocalCapabilities,
        requirements: PrivacyRequirements,
        preferences: UserProcessingPreferences,
        request: ProcessingRequest
    ) async -> ProcessingDecision {
        
        // Privacy-first decision making
        if requirements.requiresLocalProcessing {
            if capabilities.canProcessLocally {
                return ProcessingDecision.processLocally(reason: .privacyRequired)
            } else {
                return ProcessingDecision.cannotProcess(reason: .privacyConflict)
            }
        }
        
        // User preference consideration
        switch preferences.defaultPreference {
        case .alwaysLocal:
            if capabilities.canProcessLocally {
                return ProcessingDecision.processLocally(reason: .userPreference)
            } else {
                return await askUserForAlternative(request: request, limitation: capabilities.limitations)
            }
            
        case .alwaysRemote:
            if requirements.allowsRemoteProcessing {
                return ProcessingDecision.processRemotely(reason: .userPreference)
            } else {
                return ProcessingDecision.processLocally(reason: .privacyOverride)
            }
            
        case .automatic:
            return await makeAutomaticDecision(capabilities: capabilities, requirements: requirements, request: request)
        }
    }
    
    private func makeAutomaticDecision(
        capabilities: LocalCapabilities,
        requirements: PrivacyRequirements,
        request: ProcessingRequest
    ) async -> ProcessingDecision {
        
        // Calculate processing quality scores
        let localQuality = capabilities.qualityScore
        let remoteQuality = 0.95 // Assume high remote quality
        
        // Calculate privacy scores
        let localPrivacy = 1.0 // Maximum privacy
        let remotePrivacy = requirements.remotePrivacyScore
        
        // Calculate performance scores
        let localPerformance = capabilities.performanceScore
        let remotePerformance = await estimateRemotePerformance(for: request)
        
        // Weighted decision
        let localScore = (localQuality * 0.3) + (localPrivacy * 0.4) + (localPerformance * 0.3)
        let remoteScore = (remoteQuality * 0.3) + (remotePrivacy * 0.4) + (remotePerformance * 0.3)
        
        if localScore >= remoteScore {
            return ProcessingDecision.processLocally(reason: .optimal)
        } else {
            return ProcessingDecision.processRemotely(reason: .optimal)
        }
    }
}

struct ProcessingDecision {
    enum Location {
        case local
        case remote
        case cannot
    }
    
    enum Reason {
        case privacyRequired
        case privacyConflict
        case userPreference
        case privacyOverride
        case optimal
    }
    
    let location: Location
    let reason: Reason
    let explanation: String
    let alternativeOptions: [ProcessingAlternative]
    
    static func processLocally(reason: Reason) -> ProcessingDecision {
        return ProcessingDecision(
            location: .local,
            reason: reason,
            explanation: getExplanation(for: .local, reason: reason),
            alternativeOptions: []
        )
    }
    
    static func processRemotely(reason: Reason) -> ProcessingDecision {
        return ProcessingDecision(
            location: .remote,
            reason: reason,
            explanation: getExplanation(for: .remote, reason: reason),
            alternativeOptions: []
        )
    }
    
    static func cannotProcess(reason: Reason) -> ProcessingDecision {
        return ProcessingDecision(
            location: .cannot,
            reason: reason,
            explanation: getExplanation(for: .cannot, reason: reason),
            alternativeOptions: generateAlternatives(for: reason)
        )
    }
}

User Security Education

Security Awareness System

class SecurityEducationManager {
    private let educationContent: SecurityEducationContent
    private let userKnowledgeProfile: UserKnowledgeProfile
    private let adaptiveEducation: AdaptiveEducationEngine
    
    func provideContextualSecurityEducation(for event: SecurityEvent) async {
        // Assess user's current knowledge level
        let knowledgeLevel = await userKnowledgeProfile.getKnowledgeLevel(for: event.category)
        
        // Generate appropriate education content
        let educationContent = await adaptiveEducation.generateEducationContent(
            event: event,
            userLevel: knowledgeLevel
        )
        
        // Present education in user-friendly way
        await presentSecurityEducation(educationContent)
        
        // Track learning progress
        await userKnowledgeProfile.updateKnowledge(event.category, newLevel: educationContent.targetLevel)
    }
    
    private func presentSecurityEducation(_ content: SecurityEducationContent) async {
        let educationView = SecurityEducationView(content: content)
        await MainActor.run {
            // Present education view to user
            presentEducationView(educationView)
        }
    }
    
    func generateSecurityTip(for context: SecurityContext) async -> SecurityTip {
        let relevantTopics = identifyRelevantSecurityTopics(context)
        let userExpertise = await userKnowledgeProfile.getOverallExpertise()
        
        let tip = await adaptiveEducation.generateTip(
            topics: relevantTopics,
            expertise: userExpertise
        )
        
        return tip
    }
}

struct SecurityEducationContent {
    let title: String
    let level: EducationLevel
    let targetLevel: EducationLevel
    let explanation: String
    let visualAids: [EducationVisual]
    let interactiveElements: [InteractiveElement]
    let assessmentQuestions: [AssessmentQuestion]
    let practicalExercises: [PracticalExercise]
}

enum EducationLevel {
    case beginner
    case intermediate
    case advanced
    case expert
}

struct SecurityTip {
    let title: String
    let description: String
    let category: SecurityCategory
    let actionable: Bool
    let implementationSteps: [String]
    let relatedConcepts: [SecurityConcept]
}

Compliance and Audit

Compliance Manager

class ComplianceManager {
    private let gdprCompliance: GDPRComplianceEngine
    private let ccpaCompliance: CCPAComplianceEngine
    private let auditLogger: SecurityAuditLogger
    
    func ensureCompliance(for operation: DataOperation) async throws -> ComplianceResult {
        var complianceChecks: [ComplianceCheck] = []
        
        // GDPR compliance check
        let gdprCheck = await gdprCompliance.checkCompliance(operation)
        complianceChecks.append(gdprCheck)
        
        // CCPA compliance check (if applicable)
        if operation.affectsCaliforniaResidents {
            let ccpaCheck = await ccpaCompliance.checkCompliance(operation)
            complianceChecks.append(ccpaCheck)
        }
        
        // Other regional compliance checks
        let otherChecks = await performOtherComplianceChecks(operation)
        complianceChecks.append(contentsOf: otherChecks)
        
        // Aggregate results
        let overallCompliance = aggregateComplianceResults(complianceChecks)
        
        // Log compliance check
        await auditLogger.logComplianceCheck(operation, result: overallCompliance)
        
        return overallCompliance
    }
    
    func handleDataSubjectRequest(_ request: DataSubjectRequest) async throws -> DataSubjectResponse {
        switch request.type {
        case .accessRequest:
            return try await handleAccessRequest(request)
        case .deletionRequest:
            return try await handleDeletionRequest(request)
        case .rectificationRequest:
            return try await handleRectificationRequest(request)
        case .portabilityRequest:
            return try await handlePortabilityRequest(request)
        }
    }
    
    private func handleDeletionRequest(_ request: DataSubjectRequest) async throws -> DataSubjectResponse {
        // Verify identity
        try await verifyRequestorIdentity(request)
        
        // Find all data associated with the subject
        let userData = try await findUserData(subjectId: request.subjectId)
        
        // Check for legal basis to retain data
        let retentionCheck = await checkRetentionRequirements(userData)
        
        // Delete data that can be deleted
        let deletableData = userData.filter { !retentionCheck.mustRetain.contains(\$0.id) }
        try await deleteUserData(deletableData)
        
        // Anonymize data that must be retained
        let retainableData = userData.filter { retentionCheck.mustRetain.contains(\$0.id) }
        try await anonymizeUserData(retainableData)
        
        return DataSubjectResponse(
            requestId: request.id,
            status: .completed,
            actions: [
                "Deleted \(deletableData.count) data records",
                "Anonymized \(retainableData.count) data records that must be retained for legal compliance"
            ],
            completionDate: Date()
        )
    }
}

struct ComplianceResult {
    let isCompliant: Bool
    let regulations: [Regulation]
    let violations: [ComplianceViolation]
    let recommendations: [ComplianceRecommendation]
    let certificationsRequired: [ComplianceCertification]
}

enum DataSubjectRequestType {
    case accessRequest      // Right to access
    case deletionRequest    // Right to erasure
    case rectificationRequest // Right to rectification
    case portabilityRequest  // Right to data portability
}

Success Metrics

Security Effectiveness Metrics

• Threat Detection Rate: >95% of actual threats detected
• False Positive Rate: <5% of threat alerts are false positives
• Response Time: <30 seconds for automatic threat response
• User Security Burden: <1 security decision per user per week
• Compliance Rate: 100% compliance with applicable regulations

User Experience Metrics

• Security Transparency: Users understand 90% of security decisions
• Security Friction: <2% of user operations require security intervention
• Education Effectiveness: 80% improvement in user security knowledge over 6 months
• Trust Score: >4.5/5 user trust in security measures

Technical Security Metrics

• Encryption Coverage: 100% of sensitive data encrypted
• Access Control Effectiveness: 0 unauthorized access incidents
• Data Minimization: 50% reduction in collected data volume
• Privacy Compliance: 100% compliance with privacy regulations

This specification ensures SAM provides comprehensive security protection while maintaining the user-friendly experience and operational transparency that are core to the SAM vision.