Invention Grant
- Patent Title: Data processing circuit and control method therefor
- Patent Title (中): 数据处理电路及其控制方法
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Application No.: US11059413Application Date: 2005-02-17
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Publication No.: US08687799B2Publication Date: 2014-04-01
- Inventor: Shigeru Arisawa , Seiji Esaka
- Applicant: Shigeru Arisawa , Seiji Esaka
- Applicant Address: JP Tokyo
- Assignee: Sony Corporation
- Current Assignee: Sony Corporation
- Current Assignee Address: JP Tokyo
- Agency: Rader, Fishman & Grauer PLLC
- Priority: JPP2004-060998 20040304
- Main IPC: G06F21/00
- IPC: G06F21/00 ; H04L9/00 ; H04L9/06 ; G06F1/08 ; G06F1/10 ; G06F1/12 ; G06F1/32 ; G06F21/72
Abstract:
When an encryption processing circuit encrypts data, a current flows in the encryption processing circuit. A noise current generated by a noise generation circuit is superimposed on the current consumed by the encryption processing circuit. The present invention is applicable to an IC chip that encrypts plaintext data using a key, thus preventing the key from being broken by DPA attacks based on analysis of the current consumption to provide high security.
Public/Granted literature
- US20050201552A1 Data processing circuit and control method therefor Public/Granted day:2005-09-15
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