The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 11, 2017
Filed:
Jun. 02, 2014
Qualcomm Incorporated, San Diego, CA (US);
Billy Bob Brumley, San Diego, CA (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
Various features pertain to digital signatures for use in signing messages. In one aspect, a digital signature is generated based on a nonce derived using a per-message salt value, particularly a salt selected to provide a semi-deterministic nonce (i.e. a nonce that is neither fully deterministic nor completely random.) In one example, the nonce is generated by concatenating the salt value with a long-term private key and then applying the result to a key derivation function along with a hash of the message to be signed. The salt value may be, e.g., a counter, a context-specific message or may be randomly generated within a restricted range of values (relative to a full range of values associated with the particular digital signature generation protocol used to generate a digital signature from the nonce.)