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:
May. 19, 2009
Filed:
Jan. 31, 2005
Masahiko Takenaka, Kawasaki, JP;
Tetsuya Izu, Kawasaki, JP;
Kouichi Itoh, Kawasaki, JP;
Naoya Torii, Kawasaki, JP;
Masahiko Takenaka, Kawasaki, JP;
Tetsuya Izu, Kawasaki, JP;
Kouichi Itoh, Kawasaki, JP;
Naoya Torii, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An encryption device performs elliptic curve encryption using a secret key. The encryption device includes an operation unit for performing scalar multiplication of a point on an elliptic curve a storage unit having a plurality of data storing areas and a determiner unit for determining, in accordance with a bit sequence of a given value (d) and with a random value (RNG), an address of one of the plurality of data storage areas that is to be coupled to the operation means for each scalar multiplication.