Sep 23, 2025 · Information Security

How Microsoft’s 5‑Phase Secure Boot Update Tackles the BlackLotus UEFI Bootkit

Microsoft’s multi‑stage mitigation plan for the BlackLotus UEFI bootkit details five phases—from initial KB5025885 deployment to final forced enforcement—aimed at revoking vulnerable certificates, updating boot managers, and ensuring systems stay secure through automatic updates and manual activation steps.

BootkitCertificate RevocationMicrosoft

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How Microsoft’s 5‑Phase Secure Boot Update Tackles the BlackLotus UEFI Bootkit

Efficient Ops

Dec 11, 2019 · Information Security

Why HTTPS Certificate Revocation Still Fails: CRL, OCSP, and Modern Browser Challenges

This article explores how HTTPS certificates are validated, why revocation mechanisms like CRL and OCSP often fall short, compares browser implementations, and discusses practical mitigation techniques such as OCSP stapling and Must‑Staple to improve TLS security.

Browser SecurityCRLCertificate Revocation

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Why HTTPS Certificate Revocation Still Fails: CRL, OCSP, and Modern Browser Challenges