On Security of a White-Box Implementation of SHARK

被引：3

作者：

Shi, Yang ^{[1
]}

Fan, Hongfei ^{[1
]}

机构：

[1] Tongji Univ, Sch Software Engn, Shanghai 200092, Peoples R China

来源：

INFORMATION SECURITY, ISC 2015 | 2015年 / 9290卷

关键词：

White-box attack contexts; Symmetric encryption; Key exposure; SHARK; Cryptanalysis; ENCRYPTION ALGORITHM; CRYPTANALYSIS; AES;

D O I：

10.1007/978-3-319-23318-5_25

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

In a white-box attack context, an attacker has full visibility of the implementation of a cipher and full control over its execution environment. As a countermeasure against the threat of a key exposure in this context, a white-box implementation of the block cipher SHARK, i. e., the white-box SHARK, was proposed in a piece of prior work in 2013. However, based on our observation and investigation, it has been derived that the white-box SHARK is insufficiently secure, where the hidden key and external encodings can be extracted with a work factor of approximately 1.5 * (2 <^> 47).

引用

页码：455 / 471

页数：17

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