GDB Security

GDB Security operates kt-witness, an independent witness and auditor for public transparency logs. It watches Key Transparency deployments (Meta/WhatsApp, Proton, Apple, Google, Signal) and roughly eighty Certificate Transparency logs, checks that each new epoch really is an append-only extension of the last, and publishes what it finds — including the case operators rarely report on themselves, which is proof data that has silently gone missing.