All notable changes to the ZKP Chaum-Pedersen Authentication project will be documented in this file.
The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.
- Comprehensive API documentation for all public functions
- Mathematical background and security analysis in README
- Docker Compose support for easy deployment
- Performance benchmarks and characteristics documentation
- gRPC development tools and extensions guide
- Contributing guidelines and development setup
- Enhanced README with professional open-source project structure
- Improved code documentation with detailed mathematical explanations
- Expanded security considerations and production deployment notes
- Added security considerations documentation
- Documented known limitations and quantum resistance notes
- Included production deployment security recommendations
- Initial implementation of Chaum-Pedersen zero-knowledge proof protocol
- Core ZKP library with RFC 5114 standardized cryptographic parameters
- gRPC-based authentication server with three-phase protocol support
- In-memory authentication server (
server.rs) - Redis-backed authentication server (
server_redis.rs) for scalability - Complete client implementation with registration and authentication
- Login-only client for existing users
- Debug client with detailed protocol tracing
- Protocol Buffers definition for gRPC service interface
- Comprehensive test suite with multiple parameter sets
- Docker support with multi-stage builds
- MIT license
- Zero-Knowledge Authentication: Prove secret knowledge without revelation
- Chaum-Pedersen Protocol: Industry-standard discrete logarithm equality proof
- RFC 5114 Compliance: 2048-bit MODP group with 256-bit prime order subgroup
- Cryptographically Secure: All random number generation uses secure sources
- In-Memory Server: Fast development and testing server
- Redis Server: Production-ready with persistent storage
- Thread-Safe: Concurrent authentication session handling
- Error Handling: Comprehensive gRPC status code support
- Full Client: Complete registration and authentication flow
- Login Client: Authentication-only for registered users
- Debug Client: Detailed protocol step visualization
- Interactive CLI: User-friendly command-line interfaces
- Three-Phase Authentication:
- Registration: Public commitment value storage
- Challenge: Cryptographic challenge generation and response
- Verification: Zero-knowledge proof validation
- Session Management: Secure session ID generation
- Authentication IDs: Unique session tracking
- Prime Modulus (p): 2048-bit safe prime
- Subgroup Order (q): 256-bit prime
- Generators: RFC 5114 standardized alpha and beta
- Security Level: ~112 bits computational security
- Transport: gRPC over HTTP/2
- Serialization: Protocol Buffers
- Address: localhost:50051 (configurable)
- TLS Support: Ready for production TLS termination
- In-Memory: HashMap-based user data storage
- Redis: Distributed session and user data storage
- Serialization: bincode for efficient binary encoding
- num-bigint: Arbitrary precision integer arithmetic
- tonic: High-performance gRPC implementation
- tokio: Asynchronous runtime
- redis: Redis client (optional for Redis server)
- serde: Serialization framework
- rand: Cryptographically secure random number generation
- hex: Hexadecimal encoding/decoding
- prost: Protocol Buffers implementation
- Unit Tests: Core cryptographic function validation
- Integration Tests: Complete protocol flow testing
- Parameter Tests: Multiple cryptographic parameter validation
- Toy Examples: Small parameter educational examples
- RFC Compliance: Validation against standardized test vectors
- Cargo: Standard Rust build system
- tonic-build: gRPC code generation
- Multi-Binary: Five distinct executable targets
- Release Optimization: Production-ready optimized builds
- API Documentation: Comprehensive rustdoc documentation
- Protocol Explanation: Mathematical background and security analysis
- Usage Examples: Multiple client usage patterns
- Deployment Guide: Docker and native deployment instructions
- Quantum Resistance: Not quantum-secure (affects all discrete log systems)
- Forward Secrecy: Sessions don't provide forward secrecy
- Memory Storage: In-memory server loses data on restart
- Single Server: No built-in clustering or load balancing
- Side-Channel Resistance: Uses constant-time operations where possible
- Memory Safety: Rust's ownership system prevents common vulnerabilities
- Secure Randomness: All cryptographic randomness uses OS entropy
- Input Validation: Comprehensive validation of all inputs
- Quantum-resistant protocol variants
- Batch verification for performance
- Hardware security module integration
- Formal security proofs
- Mobile client libraries
- Load balancing and clustering support
- v1.0.0: Initial release with complete Chaum-Pedersen implementation
- vNext: Enhanced documentation and production readiness improvements
This project follows Semantic Versioning:
- MAJOR: Incompatible API changes
- MINOR: Backwards-compatible functionality additions
- PATCH: Backwards-compatible bug fixes
For questions, issues, or contributions, please visit the GitHub repository.