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:
Jun. 17, 2025
Filed:
Feb. 15, 2022
Applicant:
National Institute of Information and Communications Technology, Tokyo, JP;
Inventors:
Assignee:
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H04L 9/08 (2006.01);
U.S. Cl.
CPC ...
H04L 9/0877 (2013.01); H04L 9/085 (2013.01); H04L 9/0852 (2013.01); H04L 9/088 (2013.01); H04L 9/0894 (2013.01);
Abstract
An encryption key generating device includes a shared key separator separating a shared key into a first key and a second key and storing the first key in a non-volatile memory and storing the second key in a volatile memory; a key extender extending the second key to the same key length as that of the first key and storing the second key extended as a third key in the volatile memory; a key calculator calculating an encryption key by an exclusive-OR of the first key and the third key and storing it in the volatile memory.