Patent ID: 11924342
Assignee: 707 LIMITED
Field: Digital communication (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 10:
11. A computer-implemented method for anonymously evidencing the existence of a digital document comprising the steps of:
A. obtaining metadata of a digital document in a user's system;
B. obtaining a cryptographic hash of the digital document;
C. sending the metadata and the cryptographic hash to a remote device;
D. receiving the metadata and the cryptographic hash at the remote device,
E. requesting the user's identity data from an identity source;
F. obtaining a cryptographic hash of the user's identity data to form an identity hash;
G. receiving the identity hash at the remote device;
H. combining the metadata, the cryptographic hash, and the identity hash at the remote device in an evidence key generator to generate an evidence key;
I. storing the evidence key to provide a stored evidence key;
J. generating a reference code for the stored evidence key; or wherein the reference code is a QR code, and
K. sending the reference code to the user,
wherein the digital document never leaves the user's system, wherein the identity data never leaves the identity source, and wherein the reference code allows a third party to access the evidence key; or allows a third part limited access to the evidence key.