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:
Feb. 22, 2011
Filed:
Oct. 07, 2004
Hideki Imai, Yokohama, JP;
Kazukuni Kobara, Tokyo, JP;
Seonghan Shin, Tokyo, JP;
Abstract
An authentication system for mutual authentication between a terminal and a server characterized by the fact that the terminal comprises a memory means that pre-stores an authentication information P' for terminal storage; a concatenation means that yields a value P using a specific calculation formula with the input of the authentication information P′ read from the memory means and a password entered for authentication; a mask operation means that yields a value Yusing a specific calculation formula with the input of value P and an internally generated random number, and then sends Yto the server; and a master key generation means that yields a value MK using a specific calculation formula with the input of value P, an internally generated random number and a value Yreceived from the server, and the server comprises a memory means that pre-stores a password verification data H for server registration; a mask operation means that yields a value Yusing a specific calculation formula with the input of the password verification data H read from the memory means and an internally generated random number, and then sends Yto the terminal; and a master key generation means that yields a value MK using a specific calculation formula with the input of the password verification data H, an internally generated random number and a value Yreceived from the terminal.