Post-quantum cryptography (PQC) is a family of encryption algorithms designed to resist attacks from quantum computers. For AI agents that store sensitive data - patient records, financial data, proprietary research - PQC matters now, because data stolen today can be decrypted later once quantum hardware matures. Security teams call this the “harvest now, decrypt later” threat.
The risk is already here
Adversaries don’t need a quantum computer today to threaten your data. They only need to copy your encrypted data today and wait. Long-lived secrets - health records, trade positions, drug formulations - are exactly the data AI agents increasingly touch, and exactly the data that retains value for years.
Why the agent data layer is the right place to encrypt
Agents accumulate context: memory, RAG embeddings, identity, and tool definitions. If any of that sits in plaintext, it becomes a honeypot. Encrypting the agent data layer with PQC means a breach of the database, the vector store, or the LLM provider yields mathematically unreadable ciphertext.
Crypto-agility is non-negotiable
NIST is still finalizing and updating PQC standards (such as ML-KEM and ML-DSA). A practical deployment needs crypto-agility - the ability to swap algorithms with zero downtime as standards evolve and as federal mandates take effect.
What to do today
- Inventory where agent data lives in plaintext.
- Encrypt memory and RAG stores at the data layer, not just at rest.
- Choose an approach with crypto-agility so you can adopt new NIST algorithms without re-architecting.
NuDay Platform encrypts the agent data layer with crypto-agile post-quantum cryptography. Explore the platform or request a demo.