Based on the different representations of the finite field GF(256), there are different Advanced Encryption Standard(AES) implementations, which is called dual ciphers. They have the same encryption process as AES, bu...Based on the different representations of the finite field GF(256), there are different Advanced Encryption Standard(AES) implementations, which is called dual ciphers. They have the same encryption process as AES, but with parameters modified. The research of dual ciphers initially aims to find more efficient AES implementations, and later it is found that they can be used to resist side-channel attacks and for white box ciphers. In this paper, based on the rotation of columns, we propose new AES dual ciphers, which use AES directly, but with the input matrices(plaintexts and keys) and output matrix rotated. The key expansion algorithm only needs some change on the computation sequence. Because of these features, there is almost no extra cost in implementing dual ciphers and it is easy for new dual ciphers to work with other side-channel protection methods to protect AES in more dimensions.展开更多
针对云存储环境下的密文检索问题,面向精确密文检索需求设计了一种新型的精确密文全文索引方案DRDI(Different Rationality for Dual-Indexing)。该方案在密文检索技术和传统全文检索技术的研究基础上,对传统的倒排索引结构进行了改造,...针对云存储环境下的密文检索问题,面向精确密文检索需求设计了一种新型的精确密文全文索引方案DRDI(Different Rationality for Dual-Indexing)。该方案在密文检索技术和传统全文检索技术的研究基础上,对传统的倒排索引结构进行了改造,建立多属性双索引,可高效检索出包含对应关键字的文件目录信息。实验结果表明该方案具有可行性和高效性的特点。展开更多
In June 2013, the U.S. National Security Agency proposed two families of lightweight block ciphers, called SIMON and SPECK respectively. These ciphers are designed to perform excellently on both hardware and software ...In June 2013, the U.S. National Security Agency proposed two families of lightweight block ciphers, called SIMON and SPECK respectively. These ciphers are designed to perform excellently on both hardware and software platforms. In this paper, we mainly present zero-correlation linear cryptanalysis on various versions of SIMON. Firstly, by using miss- in-the-middle approach, we construct zero-correlation linear distinguishers of SIMON, and zero-correlation linear attacks are presented based oi1 careful analysis of key recovery phase. Secondly, multidimensional zero-correlation linear attacks are used to reduce the data complexity. Our zero-correlation linear attacks perform better than impossible differential attacks proposed by Abed et al. in ePrint Report 2013/568. Finally, we also use the divide-and-conquer technique to improve the results of linear cryptanalysis proposed by Javad et al. in ePrint Report 2013/663.展开更多
基金Supported by the Natural Science Foundation of Hubei Province(2016CFB454,2017CFB663)the National Key Research and Development Program of China(2016YFB0800405)
文摘Based on the different representations of the finite field GF(256), there are different Advanced Encryption Standard(AES) implementations, which is called dual ciphers. They have the same encryption process as AES, but with parameters modified. The research of dual ciphers initially aims to find more efficient AES implementations, and later it is found that they can be used to resist side-channel attacks and for white box ciphers. In this paper, based on the rotation of columns, we propose new AES dual ciphers, which use AES directly, but with the input matrices(plaintexts and keys) and output matrix rotated. The key expansion algorithm only needs some change on the computation sequence. Because of these features, there is almost no extra cost in implementing dual ciphers and it is easy for new dual ciphers to work with other side-channel protection methods to protect AES in more dimensions.
文摘针对云存储环境下的密文检索问题,面向精确密文检索需求设计了一种新型的精确密文全文索引方案DRDI(Different Rationality for Dual-Indexing)。该方案在密文检索技术和传统全文检索技术的研究基础上,对传统的倒排索引结构进行了改造,建立多属性双索引,可高效检索出包含对应关键字的文件目录信息。实验结果表明该方案具有可行性和高效性的特点。
基金This work was supported by the National Basic Research 973 Program of China under Grant No. 2013CB338002 and the National Natural Science Foundation of China under Grant Nos. 61272476, 61202420, and 61232009.
文摘In June 2013, the U.S. National Security Agency proposed two families of lightweight block ciphers, called SIMON and SPECK respectively. These ciphers are designed to perform excellently on both hardware and software platforms. In this paper, we mainly present zero-correlation linear cryptanalysis on various versions of SIMON. Firstly, by using miss- in-the-middle approach, we construct zero-correlation linear distinguishers of SIMON, and zero-correlation linear attacks are presented based oi1 careful analysis of key recovery phase. Secondly, multidimensional zero-correlation linear attacks are used to reduce the data complexity. Our zero-correlation linear attacks perform better than impossible differential attacks proposed by Abed et al. in ePrint Report 2013/568. Finally, we also use the divide-and-conquer technique to improve the results of linear cryptanalysis proposed by Javad et al. in ePrint Report 2013/663.
