Results 21 to 30 of about 353 (159)
On Feistel Structures Using a Diffusion Switching Mechanism [PDF]
, 2006 We study a recently proposed design approach of Feistel structure which employs diffusion matrices in a switching way. At ASIACRYPT 2004, Shirai and Preneel have proved that large numbers of S-boxes are guaranteed to be active if a diffusion matrix used in a round function is selected among multiple matrices. However the optimality of matrices required
Taizo Shirai, Kyoji Shibutani
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Construction of diffusion layers based on cipher structures
网络与信息安全学报, 2017 Taked diffusion layers of block cipher algorithms as the research object,lightweight diffusion layers were constructed by two cipher structures based on the characteristics of diffusion layers of lightweight block cipher algorithms,which were the ...
Peng-fei LI
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Impossible Differential Distinguishers of Two Generalized Feistel Structures [PDF]
Security and Communication Networks, 2020 Generalized Feistel structures are widely used in the design of block ciphers. In this paper, we focused on retrieving impossible differentials for two kinds of generalized Feistel structures: CAST256-like structure with Substitution-Permutation (SP) or Substitution-Permutation-Substitution (SPS) round functions (named CAST256SP and CAST256SPS ...
Huili Wang +4 more
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Full-round impossible differential attack on shadow block cipher
Cybersecurity, 2023 Lightweight block ciphers are the essential encryption algorithm for devices with limited resources. Its goal is to ensure the security of data transmission through resource-constrained devices.
Yuting Liu +3 more
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An Image Encryption Method Based on the Feistel Network and Dynamic DNA Encoding
IEEE Photonics Journal, 2018 Based on the Feistel network and dynamic deoxyribonucleic acid (DNA) encoding technology, an image encryption method is proposed using the “permutation–diffusion–scrambling” structure.
Xuncai Zhang, Zheng Zhou, Ying Niu
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An innovative approach for dynamic key dependent S-Box to enhance security of IoT systems
Measurement: Sensors, 2023 The Internet of Things (IoT) foresees pervasive and connected smart nodes that interact independently while offering varied services. Today, IoT nodes are a treasure house of data and hence security has become a major concern in IoT networks ...
Divya James, TKS Lakshmi Priya
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Yoyo trick on type‐II generalised Feistel networks
IET Information Security, 2021 This work presents a structural attack against the type‐II generalised Feistel network (GFN) with secret internal functions. First, equivalent structures of the 7‐round type‐II GFN are provided, which helps reduce the first guess of the secret round ...
Tao Hou, Ting Cui
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New Attacks on Feistel Structures with Improved Memory Complexities [PDF]
, 2015 Feistel structures are an extremely important and extensively researched type of cryptographic schemes. In this paper we describe improved attacks on Feistel structures with more than 4 rounds. We achieve this by a new attack that combines the main benefits of meet-in-the-middle attacks (which can reduce the time complexity by comparing only half ...
Dinur, Itai +3 more
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On the (im)possibility of improving the round diffusion of generalized Feistel structures
Information Processing Letters, 2022 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Kyoji Shibutani, Tetsu Iwata
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Dianzi Jishu Yingyong, 2021 NBC is a family of block ciphers using Generalized Feistel structure, designed by Xu Hong et al. There are three block and key sizes,i.e.,128/128, 128/256 and 256/256. A 16-bit Sbox is involved in the cipher as the non-linear component.
Yang Jiangshuai +3 more
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