ChaCha20 and Poly1305 for IETF Protocols (RFC 8439)

This provides three algorithms:

1. The ChaCha20 cipher.
2. The Poly1305 authenticator.
3. The CHACHA20-POLY1305 Authenticated Encryption with Associated Data (AEAD) construction.

Unit Tests

python -m unittest discover tests

References

• ChaCha20 and Poly1305 for IETF Protocols (RFC 8439)
• ChaCha20 and Poly1305 for IETF Protocols (RFC 7539) -- Obsoleted
• ChaCha, a variant of Salsa20
• The Poly1305-AES message-authentication code
• An Interface and Algorithms for Authenticated Encryption (RFC 5116)
  • 3.2. Recommended Nonce Formation
  • 4. Requirements on AEAD Algorithm Specifications

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• Cache-Collision Timing Attacks Against AES
• Advanced Encryption Standard (AES)
• New Features of Latin Dances: Analysis of Salsa, ChaCha, and Rumba
• Modified version of 'Latin Dances Revisited: New Analytic Results of Salsa20 and ChaCha'
• NaCl: Networking and Cryptography library
• poly1305-donna (GitHub)
• A Security Analysis of the Composition of ChaCha20 and Poly1305
• Recommendation for the Triple Data Encryption Algorithm (TDEA) Block Cipher (NIST 800-67)
• Selection of Future Cryptographic Standards
• Performance Measurements of ChaCha20