Patent ID: 9380050
Filing Date: 2016-06-28
CPC Classification: H04L

Claim Text:
1. A method of verifying authenticity of a scan using a system comprising: an application running on a portable computerized device; and a second computerized device separate from said portable computerized device, said method comprising: obtaining, by said application, a token from said second computerized device; supplying, by said application, a certificate; signing, by said application, said token using said certificate to create a counter-signed token; causing, by said application, said counter-signed token to be added to metadata of an electronic scanned image generated by activity of said application; receiving, by said second computerized device, said electronic scanned image and said metadata; calculating, by said second computerized device, a cryptographic digest from data of said electronic scanned image and said metadata; receiving, by said application, from said second computerized device, said cryptographic digest; encrypting, by said application, said cryptographic digest using an encryption key stored on said portable computerized device to create a content signature of said cryptographic digest; sending, by said application, said content signature to said second computerized device; and verifying authenticity of a copy of said electronic scanned image provided by said second computerized device by recalculating said content signature for said copy of said electronic scanned image said using said encryption key.