18210000. PROOF OF CONTENT EXISTENCE (SONY GROUP CORPORATION)

PROOF OF CONTENT EXISTENCE

Organization Name

SONY GROUP CORPORATION

Inventor(s)

Eric Diehl of Culver City CA (US)

PROOF OF CONTENT EXISTENCE

This abstract first appeared for US patent application 18210000 titled 'PROOF OF CONTENT EXISTENCE

Original Abstract Submitted

Proving a fixity of a catalog of documents to an auditor, including: splitting each document of the catalog of documents into a plurality of segments; calculating a fixity of each document by calculating a fixity of each segment and combining fixities of all segments, wherein the fixity of each segment is calculated by applying a fixity function on each segment; building and sending a manifest of fixities of the catalog of documents and the fixity function; randomly selecting a sample segment for each document; generating a challenge including sample fixities for a sample number of documents selected from the catalog of documents and sending the challenge to the prover; generating a response including sample segments retrieved from the sample number of documents; and verifying, for each sample segment in the response, that the fixity of each sample segment corresponds to the fixity in the manifest.