Patent ID: 11870900
Assignee: NOBLIS, INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 19:
20. A non-transitory computer-readable storage medium storing instructions for determining whether a private signing key is vulnerable to being compromised, the instructions configured to be executed by one or more microprocessors of a system, wherein execution of the instructions by the one or more microprocessors causes the system to:
receive cryptographic data comprising a plurality of digital signatures from one or more parties, wherein each of the digital signatures are based on a respective random number and a respective private signing key;
determine that the same random number is used by the same party for more than one digital signature;
in accordance with a determination that the same random number is used by the same party for more than one digital signature, determine that the private signing key of that party is vulnerable to being compromised; and
generate an alert indicating that the private signing key of the respective party is vulnerable to being compromised.