Core engineering and protocols for A2A Mutual Post-Quantum TLS.
Multi-agent workflows exchange rich context: intermediate reasoning traces, chain-of-thought analysis, proprietary business logic, and API access keys. If these communications travel over unencrypted or classically encrypted channels, third parties can intercept proprietary prompt engineering or inject malicious prompt vectors that derail the collaboration.
A2AShield injects high-speed cryptographic sidecars alongside autonomous agent processes. All inter-agent REST, gRPC, and JSON-RPC calls are automatically wrapped in mutual post-quantum TLS 1.3 tunnels using hybrid X25519MLKEM768 key exchange, ensuring end-to-end confidentiality, authenticity, and quantum immunity.