公开(公告)号：US20180211065A1

公开(公告)日：2018-07-26

申请号：US15935279

申请日：2018-03-26

Applicant: Cryptography Research, Inc.

Inventor： JOSHUA M. JAFFE

IPC: G06F21/72 ,  H04L9/00 ,  G06F7/72

Abstract: Methods and systems for masking certain cryptographic operations in a manner designed to defeat side-channel attacks are disclosed herein. Squaring operations can be masked to make squaring operations indistinguishable or less distinguishable from multiplication operations. In general, squaring operations are converted into multiplication operations by masking them asymmetrically. Additional methods and systems are disclosed for defeating DPA, cross-correlation, and high-order DPA attacks against modular exponentiation.

公开(公告)号：US20150052368A1

公开(公告)日：2015-02-19

申请号：US14530905

申请日：2014-11-03

Applicant: CRYPTOGRAPHY RESEARCH, INC.

Inventor： PAUL C. KOCHER ,  JOSHUA M. JAFFE ,  BENJAMIN C. JUN

IPC: H04L9/00 ,  G06F1/06 ,  G06F1/32

CPC classification number: H04L9/0618 ,  G06F1/06 ,  G06F1/266 ,  G06F1/3225 ,  G06F7/00 ,  G06F21/75 ,  G06F21/755 ,  G06F21/77 ,  G06F2207/7223 ,  G06F2207/7266 ,  G06K19/073 ,  G06K19/07363 ,  G06Q20/341 ,  G06Q20/382 ,  G06Q20/409 ,  G07F7/08 ,  G07F7/082 ,  G07F7/1008 ,  G09C1/00 ,  H04L9/003 ,  H04L2209/04 ,  H04L2209/08 ,  H04L2209/56 ,  H04L2209/805

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.

Abstract translation: 从智能卡和其他防篡改加密设备泄露的信息可以进行统计分析，以确定密钥或其他秘密数据。 数据采集​​和分析系统配置有连接的模拟 - 数字转换器，用于测量设备在设备处理期间变化的设备的电力消耗或目标设备的某些其他属性。 当目标设备执行加密操作时，对于每个密码操作记录来自A / D转换器的数据。 然后使用统计分析处理存储的数据，产生整个密钥，或者可以用于加速强力搜索或其他攻击的密钥的部分信息。