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:
Sep. 18, 2012
Filed:
Jun. 08, 2007
Tomohiko Ohtsu, Kanagawa, JP;
Yoshiyuki Tomoda, Kanagawa, JP;
Tomohiko Ohtsu, Kanagawa, JP;
Yoshiyuki Tomoda, Kanagawa, JP;
Renesas Electronics Corporation, Kanagawa, JP;
Abstract
A wireless communication system includes first and second communication apparatuses transmitting/receiving encrypted communication data by radio. The first includes: a first encrypting/decrypting unit encrypting communication data and decrypting encrypted communication data; a first interface unit electrically connectable with a portable nonvolatile memory (NVRAM), to which the NVRAM can be physically removably inserted; and a first cryptography key processing unit generating a temporary cryptography key used for encrypting/decrypting the communication data and a master cryptography key for generating the temporary cryptography key. The second communication apparatus includes: a second encrypting/decrypting unit encrypting the communication data and decrypting the encrypted communication data; a second interface unit electrically connectable with the NVRAM, to which the NVRAM storing the master cryptography key is physically removably inserted; and a second cryptography key processing unit generating the temporary cryptography key based on the master cryptography key read from the NVRAM connected with the second interface unit.