Why Post-Quantum Cryptography Starts With Credentials

Today’s encrypted data, such as credentials, may no longer remain confidential in the future because the public-key cryptography protecting it will soon be broken by quantum computers. Although no machine today can break elliptic curve cryptography or RSA, quantum hardware is advancing rapidly and will inevitably change how organizations protect their data. Ciphertext and credentials captured by

The article describes how today’s encrypted data—especially long-lived credentials and identities protected by RSA and elliptic-curve public-key cryptography—can be captured now and decrypted later once sufficiently powerful quantum computers exist, a "harvest now, decrypt later" threat recognized in PQC guidance.[2][3] It emphasizes the need to migrate identity, credential, and PKI ecosystems to post-quantum cryptography and crypto-agile architectures to maintain confidentiality over time.[1][2][3] From a CyberSE.AI perspective, this is primarily a data leakage and long-term confidentiality risk: AI agents and backends that rely on standard TLS, OAuth/OIDC tokens, API keys, and verifiable/anonymous credentials are vulnerable if their public-key protections are not made quantum-resistant.[3][7] Organizations should use an AI Security Readiness Assessment to inventory quantum-vulnerable cryptography around AI workloads, prioritize high-shelf-life secrets (credentials, model IP, long-term logs), and plan a phased migration to NIST-standardized PQC and hybrid schemes to reduce future quantum-enabled data leakage.[1][3][8]