Closing AI's Identity Gap: Introducing Post-Quantum Cryptography for Autonomous Agents

As AI agents increasingly perform autonomous actions like booking flights and controlling browsers, they carry critical user credentials without any cryptographic proof of their identity. Prompt injection attacks—where hidden instructions on compromised pages get mixed with legitimate content—can hijack agents to perform unauthorized actions, a vulnerability OWASP ranked as the top agentic security risk for 2026. Cord Protocol addresses this gap by providing post-quantum cryptographic signatures that verify which instructions are human-authorized versus attacker-injected, filling a critical security hole in the emerging autonomous internet.