Last updated: Jul 25, 2025, 10:08 AM UTC

PRD: Authentication & Security

Generated: 2025-07-23 00:00 UTC
Status: Complete
Verified:

Executive Summary

This PRD defines the authentication mechanisms, security requirements, and compliance standards for the Document Conversion Service. It establishes a comprehensive security framework that protects user data, ensures secure document handling, and maintains compliance with international data protection regulations while providing flexible authentication options for different user types.

Key Objectives

  • Implement robust authentication mechanisms for API access
  • Ensure end-to-end encryption for sensitive documents
  • Maintain compliance with GDPR, CCPA, and SOC 2
  • Provide enterprise-grade security features
  • Enable secure multi-tenant architecture

User Stories

As a Developer

  • I want secure API key management
  • I want to rotate keys without downtime
  • I want to restrict key permissions
  • I want to monitor key usage

As an Enterprise Admin

  • I want SSO integration with my identity provider
  • I want to enforce security policies
  • I want audit logs for compliance
  • I want data residency controls

As a Security Officer

  • I want encryption at rest and in transit
  • I want penetration test reports
  • I want security incident notifications
  • I want compliance certifications

As an End User

  • I want my documents to be secure
  • I want data to be deleted after processing
  • I want to control data retention
  • I want privacy guarantees

Functional Requirements

Authentication Methods

1. API Key Authentication

Authorization: Bearer conv_live_sk_1234567890abcdef

Key Types:

  • Live Keys: Production use
  • Test Keys: Development/testing (no charges)
  • Restricted Keys: Limited permissions
  • Temporary Keys: Time-bound access

Key Features:

  • Prefix identification (conv_live_, conv_test_)
  • Automatic key rotation reminders
  • Usage analytics per key
  • IP restriction capability

2. OAuth 2.0 Implementation

sequenceDiagram participant User participant App participant AuthServer participant API User->>App: Login request App->>AuthServer: Redirect to auth AuthServer->>User: Login form User->>AuthServer: Credentials AuthServer->>App: Auth code App->>AuthServer: Exchange for token AuthServer->>App: Access token App->>API: API request + token API->>App: Protected resource

OAuth Flows:

  • Authorization Code (web apps)
  • Client Credentials (server-to-server)
  • PKCE for public clients
  • Refresh token support

3. JWT Token Management

{
  "header": {
    "alg": "RS256",
    "typ": "JWT",
    "kid": "key-id"
  },
  "payload": {
    "sub": "user-id",
    "iss": "https://api.converter.com",
    "aud": "converter-api",
    "exp": 1234567890,
    "iat": 1234567800,
    "scope": "convert:read convert:write",
    "tenant": "org-123"
  }
}

4. SSO Integration

Supported Providers:

  • SAML 2.0 (Okta, OneLogin, Ping)
  • OpenID Connect
  • Active Directory/LDAP
  • Google Workspace
  • Microsoft Azure AD

SSO Features:

  • Just-in-time provisioning
  • Group mapping
  • Role synchronization
  • Automated deprovisioning

Authorization & Access Control

1. Role-Based Access Control (RBAC)

roles:
  admin:
    - manage:users
    - manage:billing
    - view:analytics
    - convert:all
  
  developer:
    - manage:api_keys
    - view:usage
    - convert:all
  
  viewer:
    - view:usage
    - view:analytics
  
  restricted:
    - convert:specific_formats

2. Permission Scopes

  • convert:read - View conversion history
  • convert:write - Create new conversions
  • convert:delete - Delete conversion results
  • billing:read - View billing information
  • billing:write - Modify billing settings
  • team:manage - Manage team members
  • admin:all - Full administrative access

3. Resource-Level Permissions

  • Folder-based access control
  • Tag-based permissions
  • Time-based access
  • Geographic restrictions

Data Security

1. Encryption Standards

At Rest:

  • AES-256 encryption for stored files
  • Encrypted database (TDE)
  • Encrypted backups
  • Key management via KMS

In Transit:

  • TLS 1.3 minimum
  • Certificate pinning
  • Perfect forward secrecy
  • HSTS enforcement

2. Document Security

graph TB A[File Upload] -->|TLS 1.3| B[API Gateway] B -->|Encrypt| C[Temporary Storage] C -->|Process| D[Conversion Service] D -->|Encrypt| E[Result Storage] E -->|TLS 1.3| F[Download] C -->|Auto-delete| G[Cleanup Service] E -->|Retention| G

Security Features:

  • Secure file upload with virus scanning
  • Isolated processing environments
  • Automatic data purging
  • Secure download URLs (signed, time-limited)

3. Data Retention & Deletion

Default Retention:

  • Input files: Deleted immediately after processing
  • Output files: 24 hours (Free), 30 days (Paid)
  • Metadata: 90 days
  • Logs: 1 year

Deletion Options:

  • Immediate deletion API
  • Scheduled deletion
  • GDPR right to erasure
  • Secure overwrite (DOD 5220.22-M)

Compliance & Certifications

1. Regulatory Compliance

GDPR Compliance:

  • Data processing agreements
  • Privacy by design
  • Data portability
  • Consent management
  • DPO appointment

CCPA Compliance:

  • Consumer rights implementation
  • Opt-out mechanisms
  • Data inventory
  • Privacy policy

HIPAA Compliance (Enterprise):

  • BAA agreements
  • Audit controls
  • Access logging
  • Encryption requirements

2. Security Certifications

  • SOC 2 Type II: Annual audit
  • ISO 27001: Information security
  • PCI DSS: Payment processing
  • CSA STAR: Cloud security

3. Audit & Monitoring

Audit Logging:

{
  "timestamp": "2025-07-23T10:00:00Z",
  "user_id": "user-123",
  "action": "document.convert",
  "resource": "file-abc.xlsx",
  "ip_address": "192.168.1.1",
  "user_agent": "...",
  "result": "success",
  "metadata": {
    "file_size": 1048576,
    "duration": 2.5
  }
}

Monitoring Capabilities:

  • Real-time security alerts
  • Anomaly detection
  • Failed authentication tracking
  • Geographic access patterns

Security Features

1. Advanced Threat Protection

  • DDoS protection
  • Rate limiting per IP/user
  • Automated threat blocking
  • WAF implementation

2. Vulnerability Management

  • Regular security scans
  • Penetration testing (quarterly)
  • Bug bounty program
  • Dependency scanning

3. Incident Response

Response Plan:

  1. Detection (< 15 minutes)
  2. Assessment (< 1 hour)
  3. Containment (< 2 hours)
  4. Resolution (< 24 hours)
  5. Post-mortem (< 1 week)

Communication:

  • Security incident notifications
  • Status page updates
  • Customer communications
  • Regulatory reporting

Non-Functional Requirements

Performance Requirements

  • Authentication latency < 100ms
  • Token validation < 50ms
  • Encryption overhead < 10%
  • Key rotation without downtime

Availability Requirements

  • Auth service: 99.99% uptime
  • SSO providers: Failover support
  • Key management: Multi-region
  • Audit logs: Always available

Scalability Requirements

  • 1M+ active API keys
  • 100K+ concurrent sessions
  • 10M+ audit events/day
  • Horizontal scaling

Technical Specifications

Security Architecture

1. Zero Trust Architecture

graph LR A[User] --> B[Identity Verification] B --> C[Device Trust] C --> D[Network Segmentation] D --> E[Least Privilege] E --> F[Resource Access] G[Continuous Monitoring] --> B G --> C G --> D G --> E

2. Key Management

  • AWS KMS / Google Cloud KMS
  • Hardware security modules (HSM)
  • Key rotation schedule
  • Split key custody

3. Infrastructure Security

  • VPC isolation
  • Private subnets
  • Security groups
  • Network ACLs
  • VPN access

Implementation Details

1. API Key Storage

CREATE TABLE api_keys (
    id UUID PRIMARY KEY,
    key_hash VARCHAR(256) NOT NULL,
    user_id UUID NOT NULL,
    name VARCHAR(100),
    permissions JSONB,
    ip_whitelist INET[],
    created_at TIMESTAMP,
    last_used TIMESTAMP,
    expires_at TIMESTAMP
);

2. Session Management

  • Redis session store
  • 30-minute timeout
  • Concurrent session limits
  • Session fixation protection

Success Metrics

Security Metrics

  • Zero security breaches
  • < 0.01% unauthorized access attempts
  • 100% encryption coverage
  • < 1 hour incident response time

Compliance Metrics

  • 100% audit pass rate
  • Zero compliance violations
  • < 48 hour GDPR response time
  • Quarterly security training completion

Operational Metrics

  • API key adoption > 90%
  • SSO usage (Enterprise) > 80%
  • MFA adoption > 60%
  • Security score > 95/100

Dependencies

External Services

  • Identity providers
  • Certificate authorities
  • Security scanning tools
  • Compliance platforms

Internal Systems

  • User management
  • Logging infrastructure
  • Monitoring systems
  • Incident management

Timeline & Milestones

Phase 1: Foundation (Months 1-2)

  • API key authentication
  • Basic encryption
  • Audit logging
  • Security policies

Phase 2: Enterprise (Months 3-4)

  • SSO implementation
  • Advanced RBAC
  • Compliance frameworks
  • Security scanning

Phase 3: Compliance (Months 5-6)

  • SOC 2 preparation
  • GDPR implementation
  • Security certifications
  • Penetration testing

Phase 4: Advanced (Months 7-8)

  • Zero trust architecture
  • Advanced threat protection
  • ML-based anomaly detection
  • Security automation

Risk Mitigation

Security Risks

  • Data breaches: Defense in depth strategy
  • Insider threats: Least privilege + monitoring
  • Supply chain attacks: Vendor security assessment
  • Zero-day exploits: Rapid patching process

Compliance Risks

  • Regulatory changes: Legal monitoring
  • Audit failures: Continuous compliance
  • Data residency: Multi-region deployment

Future Considerations

Enhanced Security

  • Passwordless authentication
  • Biometric support
  • Blockchain audit trails
  • Homomorphic encryption

Advanced Features

  • Risk-based authentication
  • Behavioral analytics
  • Automated compliance
  • Security orchestration