log witness
An independent party that checks a transparency log's new tree heads and co-signs the ones that are consistent with what it saw before. A witness makes it much harder for a log operator to show different histories to different readers.
What log witness does not show
CrawlCheck's log is co-signed by a workflow that runs outside its own infrastructure; a witness checks consistency, not the meaning of the entries.
Terms this definition uses
Related terms in Proof and provenance
Showing a record existed at a date without asking anyone to trust us.
transparency log · signed tree head · inclusion proof · split-view attack · cite-as link · as-of answer · citation anchor · canonical origin · signed absence · threshold verdict · OpenTimestamps · anchoring · Content hash · Manifest tampering · C2PA · CAWG training and data mining assertion · content-addressed storage · Merkle tree · SHA-256 · daily seal · byline · dateline · trust center
Questions about log witness
What is log witness?
An independent party that checks a transparency log's new tree heads and co-signs the ones that are consistent with what it saw before. A witness makes it much harder for a log operator to show different histories to different readers.
What does log witness not show or guarantee?
CrawlCheck's log is co-signed by a workflow that runs outside its own infrastructure; a witness checks consistency, not the meaning of the entries.
Which area of the glossary does log witness belong to?
Proof and provenance: Showing a record existed at a date without asking anyone to trust us.
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See it in the full glossary · 731 terms across 19 areas.