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:
Jan. 09, 2007
Filed:
Feb. 05, 2002
Shinya Iguchi, Fujisawa, JP;
Takashi Tsunehiro, Ebina, JP;
Motoyasu Tsunoda, Sagamihara, JP;
Haruji Ishihara, Kawaguchi, JP;
Nagamasa Mizushima, Fujisawa, JP;
Takashi Totsuka, Machida, JP;
Shinya Iguchi, Fujisawa, JP;
Takashi Tsunehiro, Ebina, JP;
Motoyasu Tsunoda, Sagamihara, JP;
Haruji Ishihara, Kawaguchi, JP;
Nagamasa Mizushima, Fujisawa, JP;
Takashi Totsuka, Machida, JP;
Renesas Technology Corp., Tokyo, JP;
Abstract
A storage device includes a tamper-resistant module and a flash memory. In correspondence with a command, a CPU inside the tamper-resistant module judges the security of data received from the outside, then recording the data as follows: High-security and small-capacity data is recorded into a memory inside the tamper-resistant module. High-security and large-capacity data is encrypted, then being recorded into the flash memory. Low-security data is recorded as it is into the flash memory. This recording method permits large-capacity data to be stored while ensuring a security (i.e., a security level) corresponding thereto.