Controlled Operations as a Cryptographic Primitive

Izotov, Boris V.; Moldovyan, Alexander A.; Moldovyan, Nick A.

doi:10.1007/3-540-45116-1_23

Cited by 6 publications

(3 citation statements)

References 7 publications

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“…While the operational permutation blocks (RC5, RC6, etc. [3]) still remain limitations in protective data transformation, COSB-128 [8] is a 128-bit block and 256-bit key, which uses the controllable operational substitutions in the concept of CPB [9], is proposed to give a good performance and be stable to most known cryptanalyses.…”

Section: Discussionmentioning

confidence: 99%

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Related-Key Differential Attacks on COSB-128

Tran

Lee

2015

International Journal of Distributed Sensor Networks

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COSB-128 (Moldovyan et al., 2002) is a block cipher with 128-bit and 256-bit secret keys, which use key and data-dependent operational substitutions in fast controllable permutation blocks (CPB) concept. It is designed with a simple key schedule to ensure a high speed of data transformation by fast block encryption algorithms and expected to be high stability to all known methods of cryptanalysis, especially differential and linear attacks. In this paper, we show that the COSB-128 block cipher still remains weaknesses to differential related-key cryptanalysis, by constructing two full 10-round related-key differential characteristics (DCs) of COSB-128 with high probabilities, and thence propose our two related-key differential attacks. The attacks require about 2 24 data and time complexities to recover 63-bit key information and 2 22 data and time complexities to recover 6-bit key information. This study is the first known cryptanalytic result on COSB-128 until now. From this study, the new potential for the cryptanalysis on these types of block cipher will be further revealed.

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Section: Discussionmentioning

confidence: 99%

“…When the best known algorithms using controllable permutations (RC5, RC6, etc. [3]) showed their limitations in protective transformation, the operational substitutions offer promise for fast block encryption algorithms with better performance.…”

Section: Introductionmentioning

confidence: 99%

Related-Key Differential Attacks on COSB-128

Tran

Lee

2015

International Journal of Distributed Sensor Networks

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“…A simple key schedule generator for high speed transformation and lightweight targets can lead to an attack possibility for cryptanalysis using common related-key attack methods. Related-key amplified boomerang attack [10] is an extension of the related-key boomerang attack proposed by Biham et al, 2005 [11] and Wagner, 1999 [12]. The idea of this attack is that it explores two distinctive related-key differentials to construct the related-key boomerang with high probability.…”

Section: Introductionmentioning

confidence: 99%

Cryptanalysis on SDDO-Based BM123-64 Designs Suitable for Various IoT Application Targets

Phuc

Lee

2018

Symmetry

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BM123-64 block cipher, which was proposed by Minh, N.H. and Bac, D.T. in 2014, was designed for high speed communication applications factors. It was constructed in hybrid controlled substitution–permutation network (CSPN) models with two types of basic controlled elements (CE) in distinctive designs. This cipher is based on switchable data-dependent operations (SDDO) and covers dependent-operations suitable for efficient primitive approaches for cipher constructions that can generate key schedule in a simple way. The BM123-64 cipher has advantages including high applicability, flexibility, and portability with different algorithm selection for various application targets with internet of things (IoT) as well as secure protection against common types of attacks, for instance, differential attacks and linear attacks. However, in this paper, we propose methods to possibly exploit the BM123-64 structure using related-key attacks. We have constructed a high probability related-key differential characteristics (DCs) on a full eight rounds of BM123-64 cipher. The related-key amplified boomerang attack is then proposed on all three different cases of operation-specific designs with effective results in complexity of data and time consumptions. This study can be considered as the first cryptographic results on BM123-64 cipher.

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Security analysis of SDDO-based block cipher for wireless sensor network

Phuc

Lee

2015

J Supercomput

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Controlled Operations as a Cryptographic Primitive

Cited by 6 publications

References 7 publications

Related-Key Differential Attacks on COSB-128

Related-Key Differential Attacks on COSB-128

Cryptanalysis on SDDO-Based BM123-64 Designs Suitable for Various IoT Application Targets

Security analysis of SDDO-based block cipher for wireless sensor network

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