US 2012/0233029 A1 · GENERATING PRINTABLE CERTIFICATES TO VERIFY LOG AUTHENTICITY

Abstract

A method and system for generating printable certificates to verify log authenticity. A logging module generates a compound document that includes metadata for changes made to pages in a document. Each time a change is made to the document, such as adding stroke data, the logging module updates the compound document with the changes. The online marketplace module displays an option for purchasing a printable certificate. In response to a request for a certificate, the logging module generates a printable certificate that includes a set number of hashes for previous transactions. The verification module can recreate a transaction and generate a hash that is compared to the certificate to verify that no tampering has occurred with the document.

Claims20

Dependent claims

A method of generating a printable certificate to verify the authenticity of an image, the method comprising:

receiving the image;
generating a compound document of the image;
capturing a change made to the image;
logging the change made to the image;
updating the compound document;
receiving a request for a printable certificate that includes a certificate hash for the change made to the image;
and
generating the printable certificate by extracting the certificate hash from the compound document.

5 more elements

Dependencies are inferred from the claim text.

Generating printable certificates to verify log authenticity

Life of this patent

Generating printable certificates to verify log authenticity

Life of this patent

Abstract

Claims20