Patent ID: 11916916
Assignee: WYMSICAL, INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 3:
4. A computer-implemented method, comprising:
associating an unsigned, encrypted document with at least a first authenticated user code for a first signing user and a second authenticated user code for a second signing user;
sending the unsigned, encrypted document to the first signing user and the second signing user;
decrypting the unsigned, encrypted document with stored client decryption keys corresponding to the first and second signing users after the first and second signing users have accepted the unsigned, encrypted document;
generating electronic signature data from the first authenticated user code for the first signing user and the second authenticated user code for the second signing user;
appending the electronic signature data corresponding to each signing user to the decrypted unsigned document to produce a decrypted, signed document, wherein each signature may be represented by a visible image, a visible code, or embedded metadata;
assigning ownership of the decrypted, signed document to the first and second signing users;
retrieving client encryption keys from personal, individual, electronic vaults for the first and second signing users, and encrypting the signed document with the client encryption keys of the first signing user and the second signing user; and
transferring the encrypted, signed document to first and second electronic document vaults associated with the first and second signing users, respectively;
wherein each of the first and second electronic document vaults is itself encrypted and configured to provide safe, storage at an electronic storage location hosted by a third party document service, and control of verification or viewing of the encrypted, duplicated, signed document in the first and second electronic vaults requires authorization from at least one of the first signing user and the second signing user and the use of their respective client decryption key (a) to access the document, and (b) to display the document to a requesting third party, thereby allowing the requesting third party to view the electronic signature and use the electronic signature to verify the legitimacy of the document.