Invention Grant
- Patent Title: Differential power analysis method and apparatus
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Application No.: US10005105Application Date: 2001-12-03
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Publication No.: US07587044B2Publication Date: 2009-09-08
- Inventor: Paul C. Kocher , Joshua M. Jaffe , Benjamin C. Jun
- Applicant: Paul C. Kocher , Joshua M. Jaffe , Benjamin C. Jun
- Applicant Address: US CA San Francisco
- Assignee: Cryptography Research, Inc.
- Current Assignee: Cryptography Research, Inc.
- Current Assignee Address: US CA San Francisco
- Agency: Sonnenschein Nath & Rosenthal LLP
- Main IPC: H04L9/00
- IPC: H04L9/00 ; G06F21/00

Abstract:
Information leaked from smart cards and other tamper resistant cryptographic devices can be statistically analyzed to determine keys or other secret data. A data collection and analysis system is configured with an analog-to-digital converter connected to measure the device's consumption of electrical power, or some other property of the target device, that varies during the device's processing. As the target device performs cryptographic operations, data from the A/D converter are recorded for each cryptographic operation. The stored data are then processed using statistical analysis, yielding the entire key, or partial information about the key that can be used to accelerate a brute force search or other attack.
Public/Granted literature
- US20020124178A1 Differential power analysis method and apparatus Public/Granted day:2002-09-05
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