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skybridge/kms/docs/SECURITY_ARCHITECTURE.md
Ryan Copley 6725529b01 org
2025-08-26 19:16:41 -04:00

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KMS Security Architecture

Table of Contents

  1. Security Overview
  2. Multi-Layered Security Model
  3. Authentication Security
  4. Token Security Models
  5. Authorization Framework
  6. Data Protection
  7. Security Middleware Chain
  8. Threat Model
  9. Security Controls
  10. Compliance Framework

Security Overview

The KMS implements a comprehensive security architecture based on defense-in-depth principles. Every layer of the system includes security controls designed to protect against both external threats and insider risks.

Security Objectives

  • Confidentiality: Protect sensitive data and credentials
  • Integrity: Ensure data accuracy and prevent tampering
  • Availability: Maintain service availability under attack
  • Accountability: Complete audit trail of all operations
  • Non-repudiation: Cryptographic proof of operations

Security Principles

  • Zero Trust: Verify every request regardless of source
  • Fail Secure: Safe defaults when systems fail
  • Defense in Depth: Multiple security layers
  • Least Privilege: Minimal permission grants
  • Security by Design: Security integrated into architecture

Multi-Layered Security Model

graph TB
    subgraph "External Threats"
        DDoS[DDoS Attacks]
        XSS[XSS Attacks]
        CSRF[CSRF Attacks]
        Injection[SQL Injection]
        AuthBypass[Auth Bypass]
        TokenReplay[Token Replay]
        BruteForce[Brute Force]
    end
    
    subgraph "Security Perimeter"
        subgraph "Load Balancer Security"
            NginxSec[Nginx Security<br/>- Rate limiting<br/>- SSL termination<br/>- Request filtering]
        end
        
        subgraph "Application Security Layer"
            SecurityMW[Security Middleware]
            
            subgraph "Security Headers"
                HSTS[HSTS Header<br/>max-age=31536000]
                ContentType[Content-Type-Options<br/>nosniff]
                FrameOptions[X-Frame-Options<br/>DENY]
                XSSProtection[XSS-Protection<br/>1; mode=block]
                CSP[Content-Security-Policy<br/>Restrictive policy]
            end
            
            subgraph "CORS Protection"
                Origins[Allowed Origins<br/>Whitelist validation]
                Methods[Allowed Methods<br/>GET, POST, PUT, DELETE]
                Headers[Allowed Headers<br/>Authorization, Content-Type]
                Credentials[Credentials Policy<br/>Same-origin only]
            end
            
            subgraph "CSRF Protection"
                CSRFToken[CSRF Token<br/>Double-submit cookie]
                CSRFHeader[X-CSRF-Token<br/>Header validation]
                SameSite[SameSite Cookie<br/>Strict policy]
            end
        end
        
        subgraph "Rate Limiting Defense"
            GlobalLimit[Global Rate Limit<br/>100 RPS per IP]
            EndpointLimit[Endpoint-specific<br/>Limits per route]
            BurstControl[Burst Control<br/>200 request burst]
            Backoff[Exponential Backoff<br/>Failed attempts]
        end
        
        subgraph "Authentication Security"
            MultiAuth[Multi-Provider Auth<br/>Header, JWT, OAuth2, SAML]
            
            subgraph "Token Security"
                JWTSigning[JWT Signing<br/>RS256 Algorithm]
                TokenExpiry[Token Expiration<br/>Configurable TTL]
                TokenRevocation[Token Revocation<br/>Blacklist in Redis]
                TokenRotation[Token Rotation<br/>Refresh mechanism]
            end
            
            subgraph "Static Token Security"
                HMACValidation[HMAC Validation<br/>SHA-256 signature]
                TimestampCheck[Timestamp Validation<br/>5-minute window]
                ReplayProtection[Replay Protection<br/>Nonce tracking]
                KeyRotation[Key Rotation<br/>Configurable schedule]
            end
            
            subgraph "Session Security"
                SessionEncryption[Session Encryption<br/>AES-256-GCM]
                SessionTimeout[Session Timeout<br/>Idle timeout]
                SessionFixation[Session Fixation<br/>Protection]
            end
        end
        
        subgraph "Authorization Security"
            RBAC[Role-Based Access<br/>Hierarchical permissions]
            PermissionCheck[Permission Validation<br/>Request-level checks]
            ScopeValidation[Scope Validation<br/>Token scope matching]
            PrincipleOfLeastPrivilege[Least Privilege<br/>Minimal permissions]
        end
        
        subgraph "Data Protection"
            Encryption[Data Encryption]
            
            subgraph "Encryption at Rest"
                DBEncryption[Database Encryption<br/>AES-256 column encryption]
                KeyStorage[Key Management<br/>Environment variables]
                SaltedHashing[Salted Hashing<br/>BCrypt cost 14]
            end
            
            subgraph "Encryption in Transit"
                TLS13[TLS 1.3<br/>All communications]
                CertPinning[Certificate Pinning<br/>OAuth2/SAML providers]
                MTLS[Mutual TLS<br/>Service-to-service]
            end
        end
        
        subgraph "Input Validation"
            JSONValidation[JSON Schema<br/>Request validation]
            SQLProtection[SQL Injection<br/>Parameterized queries]
            XSSProtectionValidation[XSS Protection<br/>Input sanitization]
            PathTraversal[Path Traversal<br/>Prevention]
        end
        
        subgraph "Monitoring & Detection"
            SecurityAudit[Security Audit Log<br/>All operations logged]
            FailureDetection[Failure Detection<br/>Failed auth attempts]
            AnomalyDetection[Anomaly Detection<br/>Unusual patterns]
            AlertSystem[Alert System<br/>Security incidents]
        end
    end
    
    subgraph "Database Security"
        DBSecurity[PostgreSQL Security<br/>- Connection encryption<br/>- User isolation<br/>- Query logging<br/>- Backup encryption]
    end
    
    subgraph "Infrastructure Security"
        ContainerSecurity[Container Security<br/>- Non-root user<br/>- Minimal images<br/>- Security scanning]
        NetworkSecurity[Network Security<br/>- Internal networks<br/>- Firewall rules<br/>- VPN access]
    end
    
    %% Threat Mitigation Connections
    DDoS -.->|Mitigated by| NginxSec
    XSS -.->|Prevented by| SecurityMW
    CSRF -.->|Blocked by| CSRFToken
    Injection -.->|Stopped by| JSONValidation
    AuthBypass -.->|Blocked by| MultiAuth
    TokenReplay -.->|Prevented by| TimestampCheck
    BruteForce -.->|Limited by| GlobalLimit
    
    %% Security Layer Flow
    NginxSec --> SecurityMW
    SecurityMW --> GlobalLimit
    GlobalLimit --> MultiAuth
    MultiAuth --> RBAC
    RBAC --> Encryption
    Encryption --> JSONValidation
    JSONValidation --> SecurityAudit
    
    SecurityAudit --> DBSecurity
    SecurityAudit --> ContainerSecurity
    
    %% Styling
    classDef threat fill:#ffcdd2,stroke:#d32f2f,stroke-width:2px
    classDef security fill:#c8e6c9,stroke:#388e3c,stroke-width:2px
    classDef auth fill:#e1bee7,stroke:#7b1fa2,stroke-width:2px
    classDef data fill:#fff9c4,stroke:#f57f17,stroke-width:2px
    classDef infra fill:#e3f2fd,stroke:#1976d2,stroke-width:2px
    
    class DDoS,XSS,CSRF,Injection,AuthBypass,TokenReplay,BruteForce threat
    class SecurityMW,HSTS,ContentType,FrameOptions,XSSProtection,CSP,Origins,Methods,Headers,Credentials,CSRFToken,CSRFHeader,SameSite security
    class MultiAuth,JWTSigning,TokenExpiry,TokenRevocation,TokenRotation,HMACValidation,TimestampCheck,ReplayProtection,KeyRotation,SessionEncryption,SessionTimeout,SessionFixation,RBAC,PermissionCheck,ScopeValidation,PrincipleOfLeastPrivilege auth
    class Encryption,DBEncryption,KeyStorage,SaltedHashing,TLS13,CertPinning,MTLS,JSONValidation,SQLProtection,XSSProtectionValidation,PathTraversal,SecurityAudit,FailureDetection,AnomalyDetection,AlertSystem,DBSecurity data
    class ContainerSecurity,NetworkSecurity,NginxSec,GlobalLimit,EndpointLimit,BurstControl,Backoff infra

Security Layer Breakdown

  1. Perimeter Security: Load balancer, rate limiting, DDoS protection
  2. Application Security: Security headers, CORS, CSRF protection
  3. Authentication Security: Multi-provider authentication with strong cryptography
  4. Authorization Security: RBAC with hierarchical permissions
  5. Data Protection: Encryption at rest and in transit
  6. Input Validation: Comprehensive input sanitization and validation
  7. Monitoring: Security event detection and alerting

Authentication Security

Multi-Provider Authentication Framework

The KMS supports four authentication providers, each with specific security controls:

Header-based Authentication

// File: internal/auth/header_validator.go:42
func (hv *HeaderValidator) ValidateAuthenticationHeaders(r *http.Request) (*ValidatedUserContext, error)

Security Features:

  • HMAC-SHA256 Signatures: Request integrity validation
  • Timestamp Validation: 5-minute window prevents replay attacks
  • Constant-time Comparison: Prevents timing attacks
  • Email Format Validation: Prevents injection attacks

Implementation Details:

// HMAC signature validation with constant-time comparison
func (hv *HeaderValidator) validateSignature(userEmail, timestamp, signature string) bool {
    mac := hmac.New(sha256.New, []byte(signingKey))
    mac.Write([]byte(signingString))
    expectedSignature := hex.EncodeToString(mac.Sum(nil))
    return hmac.Equal([]byte(signature), []byte(expectedSignature))
}

JWT Authentication

// File: internal/auth/jwt.go:47
func (j *JWTManager) GenerateToken(userToken *domain.UserToken) (string, error)

Security Features:

  • RSA Signatures: Strong cryptographic signing
  • Token Revocation: Redis-backed blacklist
  • Secure JTI Generation: Cryptographically secure token IDs
  • Claims Validation: Complete token verification

Token Structure:

{
  "iss": "kms-api-service",
  "sub": "user@example.com",
  "aud": ["app-id"],
  "exp": 1642781234,
  "iat": 1642694834,
  "nbf": 1642694834,
  "jti": "secure-random-id",
  "user_id": "user@example.com",
  "app_id": "app-id",
  "permissions": ["app.read", "token.create"],
  "token_type": "user",
  "max_valid_at": 1643299634
}

OAuth2 Authentication

// File: internal/auth/oauth2.go

Security Features:

  • Authorization Code Flow: Secure OAuth2 flow implementation
  • State Parameter: CSRF protection for OAuth2
  • Token Exchange: Secure credential handling
  • Provider Validation: Certificate pinning support

SAML Authentication

// File: internal/auth/saml.go

Security Features:

  • XML Signature Validation: Assertion integrity verification
  • Certificate Validation: Provider certificate verification
  • Attribute Extraction: Secure claim processing
  • Replay Protection: Timestamp and nonce validation

Token Security Models

Static Token Security (HMAC-based)

stateDiagram-v2
    [*] --> TokenRequest: Client requests token
    
    state TokenRequest {
        [*] --> ValidateApp: Validate app_id
        ValidateApp --> ValidatePerms: Check permissions
        ValidatePerms --> GenerateToken: Create token
        GenerateToken --> [*]
    }
    
    TokenRequest --> StaticToken: type=static
    
    state StaticToken {
        [*] --> GenerateHMAC: Generate HMAC key
        GenerateHMAC --> HashKey: BCrypt hash (cost 14)
        HashKey --> StoreDB: Store in static_tokens table
        StoreDB --> GrantPerms: Assign permissions
        GrantPerms --> Active: Token ready
        
        Active --> Verify: Incoming request
        Verify --> ValidateHMAC: Check HMAC signature
        ValidateHMAC --> CheckTimestamp: Replay protection
        CheckTimestamp --> CheckPerms: Validate permissions
        CheckPerms --> Authorized: Permission check
        CheckPerms --> Denied: Permission denied
        
        Active --> Revoke: Admin action
        Revoke --> Revoked: Update granted_permissions.revoked=true
    }
    
    Authorized --> TokenResponse: Success response
    Denied --> ErrorResponse: Error response
    Revoked --> [*]: Token lifecycle end
    
    note right of StaticToken
        Static tokens use HMAC signatures
        - Timestamp-based replay protection
        - BCrypt hashed storage
        - Permission-based access control
        - No expiration (until revoked)
    end note

Token Format

Format: {PREFIX}_{BASE64_DATA}
Example: ABC_xyz123base64encodeddata...
Validation: HMAC-SHA256(request_data, hmac_key)
Storage: BCrypt hash (cost 14)
Lifetime: No expiration (until revoked)

Security Implementation

// File: internal/crypto/token.go:95
func (tg *TokenGenerator) HashToken(token string) (string, error) {
    hash, err := bcrypt.GenerateFromPassword([]byte(token), tg.bcryptCost)
    if err != nil {
        return "", fmt.Errorf("failed to hash token with bcrypt cost %d: %w", tg.bcryptCost, err)
    }
    return string(hash), nil
}

User Token Security (JWT-based)

stateDiagram-v2
    [*] --> UserTokenRequest: User requests token
    
    state UserTokenRequest {
        [*] --> AuthUser: Authenticate user
        AuthUser --> GenerateJWT: Create JWT with claims
        GenerateJWT --> SetExpiry: Set expires_at, max_valid_at
        SetExpiry --> StoreSession: Store user session
        StoreSession --> Active: JWT issued
    }
    
    UserTokenRequest --> UserToken: type=user
    
    state UserToken {
        Active --> Verify: Incoming request
        Verify --> ValidateJWT: Check JWT signature
        ValidateJWT --> CheckExpiry: Verify expiration
        CheckExpiry --> CheckRevoked: Check revocation list
        CheckRevoked --> Authorized: Valid token
        CheckRevoked --> Denied: Token invalid
        CheckExpiry --> Expired: Token expired
        
        Active --> Renew: Renewal request
        Renew --> CheckRenewal: Within renewal window?
        CheckRenewal --> GenerateNew: Issue new JWT
        CheckRenewal --> Denied: Renewal denied
        GenerateNew --> Active: New token active
        
        Active --> Logout: User logout
        Logout --> Revoked: Add to revocation list
        
        Expired --> Renew: Attempt renewal
    }
    
    Authorized --> TokenResponse: Success response
    Denied --> ErrorResponse: Error response
    Revoked --> [*]: Token lifecycle end
    
    note right of UserToken
        User tokens are JWT-based
        - Configurable expiration
        - Renewable within limits
        - Session tracking
        - Hierarchical permissions
    end note

Token Format

Format: {CUSTOM_PREFIX}UT-{JWT_TOKEN}
Example: ABC123UT-eyJhbGciOiJSUzI1NiIs...
Validation: RSA signature + claims validation
Storage: Revocation list in Redis
Lifetime: Configurable with renewal window

Security Features

  • RSA-256 Signatures: Strong cryptographic validation
  • Token Revocation: Redis blacklist with TTL
  • Renewal Controls: Limited renewal window
  • Session Tracking: Database session management

Authorization Framework

Role-Based Access Control (RBAC)

The KMS implements a hierarchical permission system with role-based access control:

Permission Hierarchy

admin
├── app.admin
│   ├── app.read
│   ├── app.write
│   │   ├── app.create
│   │   ├── app.update
│   │   └── app.delete
├── token.admin
│   ├── token.read
│   │   └── token.verify
│   ├── token.write
│   │   ├── token.create
│   │   └── token.revoke
├── permission.admin
│   ├── permission.read
│   ├── permission.write
│   │   ├── permission.grant
│   │   └── permission.revoke
└── user.admin
    ├── user.read
    └── user.write

Role Definitions

// File: internal/auth/permissions.go:151
func (h *PermissionHierarchy) initializeDefaultRoles() {
    defaultRoles := []*Role{
        {
            Name:        "super_admin",
            Description: "Super administrator with full access",
            Permissions: []string{"admin"},
            Metadata:    map[string]string{"level": "system"},
        },
        {
            Name:        "app_admin", 
            Description: "Application administrator",
            Permissions: []string{"app.admin", "token.admin", "user.read"},
            Metadata:    map[string]string{"level": "application"},
        },
        // Additional roles...
    }
}

Permission Evaluation

// File: internal/auth/permissions.go:201
func (pm *PermissionManager) HasPermission(ctx context.Context, userID, appID, permission string) (*PermissionEvaluation, error) {
    // Cache lookup first
    cacheKey := cache.CacheKey(cache.KeyPrefixPermission, fmt.Sprintf("%s:%s:%s", userID, appID, permission))
    
    // Evaluate permission with hierarchy
    evaluation := pm.evaluatePermission(ctx, userID, appID, permission)
    
    // Cache result for 5 minutes
    pm.cacheManager.SetJSON(ctx, cacheKey, evaluation, 5*time.Minute)
    
    return evaluation, nil
}

Authorization Controls

Resource Ownership

// File: internal/authorization/rbac.go:100
func (a *AuthorizationService) AuthorizeApplicationOwnership(userID string, app *domain.Application) error {
    // System admins can access any application
    if a.isSystemAdmin(userID) {
        return nil
    }
    
    // Check if user is the owner
    if a.isOwner(userID, &app.Owner) {
        return nil
    }
    
    return errors.NewForbiddenError("You do not have permission to access this application")
}

Token Scoping

// File: internal/services/token_service.go:400
func (s *tokenService) verifyStaticToken(ctx context.Context, req *domain.VerifyRequest, app *domain.Application) (*domain.VerifyResponse, error) {
    // Get granted permissions for this token
    permissions, err := s.grantRepo.GetGrantedPermissionScopes(ctx, domain.TokenTypeStatic, matchedToken.ID)
    
    // Check specific permissions if requested
    if len(req.Permissions) > 0 {
        permissionResults, err := s.grantRepo.HasAnyPermission(ctx, domain.TokenTypeStatic, matchedToken.ID, req.Permissions)
        // Validate all requested permissions are granted
    }
}

Data Protection

Encryption at Rest

Database Encryption

-- Sensitive data encryption in PostgreSQL
CREATE TABLE applications (
    app_id VARCHAR(100) PRIMARY KEY,
    hmac_key TEXT, -- Encrypted with application-level encryption
    created_at TIMESTAMP DEFAULT NOW()
);

CREATE TABLE static_tokens (
    id UUID PRIMARY KEY,
    key_hash TEXT NOT NULL, -- BCrypt hashed with cost 14
    created_at TIMESTAMP DEFAULT NOW()
);

BCrypt Hashing

// File: internal/crypto/token.go:22
const BcryptCost = 14 // 2025 security standards (minimum 14)

func (tg *TokenGenerator) HashToken(token string) (string, error) {
    hash, err := bcrypt.GenerateFromPassword([]byte(token), tg.bcryptCost)
    if err != nil {
        return "", fmt.Errorf("failed to hash token with bcrypt cost %d: %w", tg.bcryptCost, err)
    }
    return string(hash), nil
}

Encryption in Transit

TLS Configuration

// TLS 1.3 configuration for all communications
tlsConfig := &tls.Config{
    MinVersion: tls.VersionTLS13,
    CipherSuites: []uint16{
        tls.TLS_AES_256_GCM_SHA384,
        tls.TLS_CHACHA20_POLY1305_SHA256,
        tls.TLS_AES_128_GCM_SHA256,
    },
}

Certificate Pinning

// OAuth2/SAML provider certificate pinning
func (o *OAuth2Provider) validateCertificate(cert *x509.Certificate) error {
    expectedFingerprints := o.config.GetStringSlice("OAUTH2_CERT_FINGERPRINTS")
    
    fingerprint := sha256.Sum256(cert.Raw)
    fingerprintHex := hex.EncodeToString(fingerprint[:])
    
    for _, expected := range expectedFingerprints {
        if fingerprintHex == expected {
            return nil
        }
    }
    
    return fmt.Errorf("certificate fingerprint mismatch")
}

Security Middleware Chain

Middleware Processing Order

  1. Request Logger: Structured logging with security context
  2. Security Headers: XSS, clickjacking, MIME-type protection
  3. CORS Handler: Cross-origin request validation
  4. CSRF Protection: Double-submit token validation
  5. Rate Limiter: DDoS and abuse protection
  6. Authentication: Multi-provider authentication
  7. Authorization: Permission validation
  8. Input Validation: Request sanitization and validation

Rate Limiting Implementation

// File: internal/middleware/security.go:48
func (s *SecurityMiddleware) RateLimitMiddleware(next http.Handler) http.Handler {
    return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
        clientIP := s.getClientIP(r)
        limiter := s.getRateLimiter(clientIP)
        
        if !limiter.Allow() {
            s.logger.Warn("Rate limit exceeded", 
                zap.String("client_ip", clientIP),
                zap.String("path", r.URL.Path))
            
            s.trackRateLimitViolation(clientIP)
            
            http.Error(w, `{"error":"rate_limit_exceeded"}`, http.StatusTooManyRequests)
            return
        }
        
        next.ServeHTTP(w, r)
    })
}

Brute Force Protection

// File: internal/middleware/security.go:365
func (s *SecurityMiddleware) checkAndBlockIP(clientIP string) {
    var count int
    err := s.cacheManager.GetJSON(ctx, key, &count)
    
    maxFailures := s.config.GetInt("MAX_AUTH_FAILURES")
    if maxFailures <= 0 {
        maxFailures = 5 // Default
    }
    
    if count >= maxFailures {
        // Block the IP for 1 hour
        blockInfo := map[string]interface{}{
            "blocked_at":     time.Now().Unix(),
            "failure_count":  count,
            "reason":         "excessive_auth_failures",
        }
        
        s.cacheManager.SetJSON(ctx, blockKey, blockInfo, blockDuration)
    }
}

Threat Model

External Threats

Network-based Attacks

  • DDoS: Rate limiting and load balancer protection
  • Man-in-the-Middle: TLS 1.3 encryption
  • Packet Sniffing: End-to-end encryption

Application-level Attacks

  • SQL Injection: Parameterized queries only
  • XSS: Input validation and CSP headers
  • CSRF: Double-submit token protection
  • Session Hijacking: Secure session management

Authentication Attacks

  • Brute Force: Rate limiting and account lockout
  • Credential Stuffing: Multi-factor authentication support
  • Token Replay: Timestamp validation and nonces
  • JWT Attacks: Strong cryptographic signing

Insider Threats

Privileged User Abuse

  • Audit Logging: Complete audit trail
  • Role Separation: Principle of least privilege
  • Session Monitoring: Abnormal activity detection

Data Exfiltration

  • Access Controls: Resource-level authorization
  • Data Classification: Sensitive data identification
  • Export Monitoring: Large data access alerts

Security Controls

Preventive Controls

Authentication Controls

  • Multi-factor authentication support
  • Strong password policies (where applicable)
  • Account lockout mechanisms
  • Session timeout enforcement

Authorization Controls

  • Role-based access control (RBAC)
  • Resource-level permissions
  • API endpoint protection
  • Ownership validation

Data Protection Controls

  • Encryption at rest (AES-256)
  • Encryption in transit (TLS 1.3)
  • Key management procedures
  • Secure data disposal

Detective Controls

Monitoring and Logging

// Comprehensive audit logging
type AuditLog struct {
    ID           uuid.UUID         `json:"id"`
    Timestamp    time.Time         `json:"timestamp"`
    UserID       string            `json:"user_id"`
    Action       string            `json:"action"`
    ResourceType string            `json:"resource_type"`
    ResourceID   string            `json:"resource_id"`
    IPAddress    string            `json:"ip_address"`
    UserAgent    string            `json:"user_agent"`
    Metadata     map[string]interface{} `json:"metadata"`
}

Security Event Detection

  • Failed authentication attempts
  • Privilege escalation attempts
  • Unusual access patterns
  • Token misuse detection

Responsive Controls

Incident Response

  • Automated threat response
  • Token revocation procedures
  • User account suspension
  • Alert escalation workflows

Recovery Controls

  • Backup and restore procedures
  • Disaster recovery planning
  • Business continuity measures
  • Data integrity verification

Compliance Framework

OWASP Top 10 Protection

  1. Injection: Parameterized queries, input validation
  2. Broken Authentication: Multi-provider auth, strong crypto
  3. Sensitive Data Exposure: Encryption, secure storage
  4. XML External Entities: JSON-only API
  5. Broken Access Control: RBAC, authorization checks
  6. Security Misconfiguration: Secure defaults
  7. Cross-Site Scripting: Input validation, CSP
  8. Insecure Deserialization: Safe JSON handling
  9. Known Vulnerabilities: Regular dependency updates
  10. Logging & Monitoring: Comprehensive audit trails

Regulatory Compliance

SOC 2 Type II Controls

  • Security: Access controls, encryption, monitoring
  • Availability: High availability, disaster recovery
  • Processing Integrity: Data validation, error handling
  • Confidentiality: Data classification, access restrictions
  • Privacy: Data minimization, consent management

GDPR Compliance (where applicable)

  • Data Protection by Design: Privacy-first architecture
  • Consent Management: Granular consent controls
  • Right to Erasure: Data deletion procedures
  • Data Portability: Export capabilities
  • Breach Notification: Automated incident response

NIST Cybersecurity Framework

  • Identify: Asset inventory, risk assessment
  • Protect: Access controls, data security
  • Detect: Monitoring, anomaly detection
  • Respond: Incident response procedures
  • Recover: Business continuity planning

Security Metrics

Key Security Indicators

  • Authentication success/failure rates
  • Authorization denial rates
  • Token usage patterns
  • Security event frequency
  • Incident response times

Security Monitoring

alerts:
  - name: "High Authentication Failure Rate"
    condition: "auth_failures > 10 per minute per IP"
    severity: "warning"
    
  - name: "Privilege Escalation Attempt"
    condition: "permission_denied + elevated_permission"
    severity: "critical"
    
  - name: "Token Abuse Detection"
    condition: "token_usage_anomaly"
    severity: "warning"

This security architecture document provides comprehensive coverage of the KMS security model, suitable for security audits, compliance reviews, and security team training.