State of Post Quantum Cryptography

This report evaluates the state of post-quantum cryptography (PQC) adoption and readiness as of 2026, noting Google's 2029 migration timeline and a shift to prioritize PQC digital signatures. It summarizes NIST approvals (ML-DSA and SLH-DSA), compares algorithm trade-offs, reports limited ecosystem support (browsers, CAs, VPNs), provides cloud and enterprise telemetry (low PQC usage in APIs, TLS connections, and services), and recommends inventorying and prioritizing upgrades to enable PQC key exchange and signing.