Patent ID: 11900801
Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 2:
3. The computer-implemented method of claim 1, further comprising:
generating a first string comprising the first character code and the first set of the characters;
computing a hash value of the first string, by the first camera using a hash function, wherein the secured file comprises the hash value of the first string;
generating a second string comprising the first character code and the second set of the characters;
computing a hash value of the second string, by the second camera using the hash function;
comparing the hash value of the first string with the hash value of the second string;
wherein the first camera comprises a first persistent memory device storing the first character code and inaccessible from outside the first camera;
wherein the second camera comprises a second persistent memory device storing the first character code and inaccessibly from outside the second camera; and
wherein the first character code is generated uniquely for the first camera and the second camera.