Description

Commission a professional security audit of the opentdf-rs cryptographic library, with special focus on the KAS (Key Access Service) protocol implementation.

Motivation

As a cryptographic library handling sensitive data and key management, a professional security audit provides:

• Independent verification of security properties
• Expert review of cryptographic implementations
• Identification of potential vulnerabilities
• Compliance validation (FIPS, etc.)
• Increased confidence for production deployments

Scope

Primary Focus Areas:

1. KAS Protocol Implementation

   • Rewrap protocol flow
   • Key wrapping/unwrapping operations
   • JWT token handling
   • Authentication and authorization

2. Cryptographic Primitives

   • RSA-OAEP implementation (aws-lc-rs integration)
   • ECDH key agreement
   • HKDF key derivation
   • AES-GCM encryption/decryption

3. Key Management

   • Ephemeral key generation
   • Key lifecycle management
   • Secure random number generation
   • Key zeroization

4. Error Handling

   • Information leakage in error messages
   • Timing side-channels
   • Exception safety

Secondary Areas:

• WebCrypto integration (WASM)
• TDF manifest parsing
• Policy binding verification
• Dependency security

Recommended Audit Firms

Consider firms with cryptographic expertise:

• NCC Group
• Trail of Bits
• Cure53
• Quarkslab
• Kudelski Security

Deliverables

1. Comprehensive security audit report
2. Vulnerability findings with severity ratings
3. Remediation recommendations
4. Re-audit after fixes (if needed)
5. Public disclosure (if appropriate)

Timeline

• Audit duration: 2-4 weeks
• Remediation: 2-4 weeks
• Re-audit: 1 week

Budget Considerations

Professional security audits typically cost 0,000-00,000+ depending on scope and depth.

Benefits

• Independent security validation
• Increased user confidence
• Compliance support
• Vulnerability discovery before production issues
• Security best practices validation

Related

Part of post-merge improvements from PR #53 security review.

Priority

High - Important for production deployments and enterprise adoption