Google Cloud has introduced quantum-safe digital signatures in Cloud Key Management Service (Cloud KMS) for software-based keys to protect encryption systems against future quantum threats. Currently in preview, this feature aligns with NIST’s post-quantum cryptography (PQC) standards (FIPS 203, 204, and 205), enabling secure key management, encryption, and digital signatures. Google is also collaborating with HSM vendors and External Key Manager (EKM) partners to expand quantum-safe cryptography. The initiative aims to counter the Harvest Now, Decrypt Later (HNDL) threat, ensuring long-term data security. Cloud KMS now supports ML-DSA-65 (FIPS 204) and SLH-DSA-SHA2-128S (FIPS 205), with future API enhancements planned.

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