Cloudflare joins Signal key transparency system as independent auditor

PUBT · 2d ago
Cloudflare joins Signal key transparency system as independent auditor
  • Cloudflare joined Signal as an independent auditor for the app’s Key Transparency system supporting automatic key verification.
  • Role aims to strengthen trust in end-to-end encryption by verifying a tamper-evident log of key changes for global consistency.
  • Auditor pulls batches from the log, cryptographically checks consistency, then signs updates for Signal to distribute to users.
  • Cloudflare said its auditor operates only on cryptographic proofs, without access to user identifiers, public keys, or message content.
  • Move extends Cloudflare’s key-transparency work in messaging, following its 2024 appointment as a WhatsApp auditor.


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