QTL: A new ultra-lightweight block cipher
QTL: A new ultra-lightweight block cipher
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QTL：一种新的超轻量级分组密码
DOI：
10.1016/j.micpro.2016.03.011
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发表时间：
2016-08-01
影响因子：
2.6
通讯作者：
Wang, Hui
中科院分区：
文献类型：
--
作者：
Li, Lang;Liu, Botao;Wang, Hui
我们提出了一种新的超轻量分组密码，QTL。64位分组密码QTL支持64位和128位密钥。为了解决传统Feistel型结构扩散缓慢的问题，我们在QTL设计中使用了一种新的广义Feistel网络结构。传统的Feistel类型的结构在一个迭代轮中只改变一半的块消息，但我们的结构克服了这个缺点，改变了所有的块消息。因此，我们的结构具有快速扩散的替代置换网络（SPN）结构，这提高了轻量级分组密码的安全性在Feistel型结构。而且，QTL算法具有相同的加密和解密过程，因此在资源受限的应用中，它将占用更少的面积。此外，为了在保持安全性的同时减少密码硬件实现中的能量消耗成本，我们决定不使用密钥调度。我们表明，QTL提供了一个足够的安全水平对经典的分析。我们的硬件实现的64位和128位密钥模式只需要1025.52和1206.52门等效，分别。QTL在硬件上实现了高安全性和紧凑的实现。QTL是最有竞争力的超轻量级分组密码之一，适用于极端受限的设备。(C)2016爱思唯尔B.V.保留所有权利。
We propose a new ultra-lightweight block cipher, QTL. The 64 bits block cipher QTL supports 64 and 128 bits keys. To solve the slow diffusion of the traditional Feistel-type structures we have used a new variant of generalized Feistel network structure in design of the QTL. Traditional Feistel-type structures change only half of block messages in an iterative round, but our structure overcomes this disadvantage and changes all block messages. Thus, our structure has the fast diffusion of the Substitution Permutation Networks (SPNs) structures, which improves the security of lightweight block cipher in Feistel-type structures. Moreover, QTL algorithm has the same encryption and decryption processes, so it will occupy less area in resource-constrained applications. Furthermore, to reduce the cost of energy consumption in hardware implementation of the cipher while maintaining security, we decide not to use a key schedule. We show that QTL offers an adequate security level against classic analyses. Our hardware implementation for the 64 and the 128 bits keys modes only require 1025.52 and 1206.52 gate equivalents, respectively. QTL achieves high security and compact implementation in hardware. QTL is one of the most competitive ultra-lightweight block ciphers, which is suitable for extremely constrained devices. (C) 2016 Elsevier B.V. All rights reserved.