Core engineering and protocols for Anti-Downgrade Attack Defense.
During the multi-year transition to post-quantum cryptography, servers must maintain backward compatibility with legacy clients. A network Man-in-the-Middle (MitM) attacker can exploit this compatibility by intercepting the client's handshake and stripping out modern post-quantum cipher-suites, deceiving the server into believing the client only supports vulnerable RSA or ECDH.
PQCRoute implements rigorous downgrade sentinels: servers embed cryptographic verification hashes into TLS ServerRandom strings that confirm whether the client originally offered PQC capabilities. If an active tampering event is detected, PQCRoute instantly severs the TCP connection and broadcasts an automated security alert to the corporate Security Operations Center (SOC).