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

Claim 13:
14. A method for determining whether a private signing key is vulnerable to being compromised, the method performed by a system comprising one or more microprocessors, the method comprising:
receiving cryptographic data comprising a plurality of digital signatures from one or more parties, wherein each of the plurality of digital signatures are based on a respective random number and a respective private signing key;
determining 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, determining that the private signing key of that party is vulnerable to being compromised; and
generating an alert indicating that the private signing key of the respective party is vulnerable to being compromised.