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A secure white-box SM4 implementation

机译:安全的白盒SM4实施

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White-box cryptography aims at implementing a cipher to protect its key from being extracted in a white-box attack context, where an attacker has full control over dynamic execution of the cryptographic software. So far, most white-box implementations exploit lookup-table-based techniques and have been broken because of a weakness that the embedded large linear encodings are cancelled out by compositions of lookup tables. In this paper, we propose a new lookup-table-based white-box implementation for the Chinese block cipher standard SM4 that can protect the large linear encodings from being cancelled out. Our implementation, which can resist a series of white-box attacks, requires 32.5MB of memory to store the lookup tables and is about nine times as fast as the previous Xiao-Lai white-box SM4 implementation. Copyright (c) 2015 John Wiley & Sons, Ltd
机译:白盒密码学旨在实现一种密码,以保护其密钥免于在白盒攻击上下文中被提取,在该上下文中,攻击者可以完全控制密码软件的动态执行。到目前为止,大多数白盒实现都利用基于查找表的技术,但由于存在缺陷,即嵌入的大型线性编码被查找表的组成部分抵消,因此被打破了。在本文中,我们为中文分组密码标准SM4提出了一种新的基于查找表的白盒实现,可以保护大型线性编码不被取消。我们的实现可以抵抗一系列白盒攻击,它需要32.5MB的内存来存储查找表,并且比以前的Xiao-Lai白盒SM4实现快大约九倍。版权所有(c)2015 John Wiley&Sons,Ltd

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