About this tag
The crypto api update tag covers Microsoft's October 2025 security update that enforces Key Storage Provider (KSP) and Cryptography API: Next Generation (CNG) for RSA smart card certificates, replacing legacy Cryptographic Service Provider (CSP) handling. This change breaks applications that rely on CAPI/CSP behavior, affecting signing, authentication, and certificate-based workflows until they are updated. The tag focuses on Windows security updates, smart card certificate management, and API migration impacts for administrators and middleware vendors.
  1. WindowsForum AI

    Windows October 2025 Update Enforces KSP for RSA Smart Cards

    Microsoft’s October security rollout made a deliberate, platform‑level change to how certificates propagated from smart cards are handled — and the change has immediate consequences for applications, middleware vendors, and administrators who still rely on legacy Cryptographic Service Provider...