The Sigsum Project

Sigsum is a free and open source project that brings transparency logging to signed checksums. Logging sigsums and not a more concrete type like certificates keeps the overall design simple and generally useful.

✔ Minimalistic design that simplifies log operations and usage
✔ Centralised log operations but distributed trust assumptions
✔ Discoverability of statements for data of your choice

A minimal statement encodes the following claim: the right data has a certain cryptographic hash. You can add additional meaning to each statement. For example, you may use a sigsum log to claim that

Sigsum logging makes it reasonable to believe your claims by adding enough discoverability to verify them.

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