Invention Grant
- Patent Title: Cryptographic device having tamper resistance to power analysis attack
- Patent Title (中): 具有抗电力分析攻击的加密设备
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Application No.: US11782168Application Date: 2007-07-24
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Publication No.: US08391477B2Publication Date: 2013-03-05
- Inventor: Tetsuya Izu , Kouichi Itoh , Masahiko Takenaka
- Applicant: Tetsuya Izu , Kouichi Itoh , Masahiko Takenaka
- Applicant Address: JP Kawasaki
- Assignee: Fujitsu Limited
- Current Assignee: Fujitsu Limited
- Current Assignee Address: JP Kawasaki
- Agency: Staas & Halsey LLP
- Main IPC: H04K1/00
- IPC: H04K1/00 ; H04L9/00 ; G06F7/58 ; G06F11/30 ; G06F12/14
Abstract:
A randomly selected point on an elliptic curve is set as the initial value of a variable and calculation including a random point value is performed in an algorithm for calculating arbitrary scalar multiple operation on an elliptic curve when scalar multiplication and addition on an elliptic curve are defined, then a calculation value obtained as a result of including a random point is subtracted from the calculation result, whereby an intended scalar multiple operation value on an elliptic curve is determined.
Public/Granted literature
- US20080025500A1 CRYPTOGRAPHIC DEVICE HAVING TAMPER RESISTANCE TO POWER ANALYSIS ATTACK Public/Granted day:2008-01-31
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