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:
Oct. 23, 2018
Filed:
May. 15, 2014
Applicant:
Mstar Semiconductor, Inc., Hsinchu Hsien, TW;
Inventor:
Ching-Wen Ma, Hsinchu County, TW;
Assignee:
MSTAR SEMICONDUCTOR, INC., Hsinchu Hsien, TW;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L 9/06 (2006.01); H04L 9/00 (2006.01);
U.S. Cl.
CPC ...
H04L 9/0643 (2013.01); H04L 9/003 (2013.01); H04L 2209/046 (2013.01); H04L 2209/08 (2013.01); H04L 2209/16 (2013.01);
Abstract
A cryptographic device and a secret key protection method are provided. The cryptographic device protects a secret key of the cryptographic device when processing a message. The cryptographic device includes: a secret key protection circuit, configured to generate an anti-crack protection signal according to the message and the secret key by a hash calculation circuit; and a cryptographic processor, configured to process the message and the secret key according to the anti-crack protection signal to generate an encrypted message.