CLEFIA

About: CLEFIA is a research topic. Over the lifetime, 124 publications have been published within this topic receiving 3350 citations.

Impossible Differential Cryptanalysis of CLEFIA-128/192/256

Abstract: An improved impossible differential attack on the block cipher CLEFIA is presented.CLEFIA was proposed by Sony Corporation at FSE 2007.Combining some observations with new tricks,the wrong keys are filtered out more efficiently,and the original impossible differential attack on 11-round CLEFIA-192/256 published by the designers,is extended to CLEFIA-128/192/256,with about 2103.1 encryptions and 2103.1 chosen plaintexts.By putting more constraint conditions on plaintext pairs,we present an attack on 12-round CLEFIA for all three key lengths with 2119.1 encryptions and 2119.1 chosen plaintexts.Moreover,a birthday sieve method is introduced to decrease the complexity of the precomputation.And an error about the time complexity evaluation in Tsunoo et al.'s attack on 12-round CLEFIA is pointed out and corrected.

Security analysis of CLEFIA-128

Abstract: Biclique attack is one of the most recent methods for cryptanalysis of block ciphers. In this paper, we present a new biclique attack on the full round of the lightweight block cipher CLEFIA-128. We obtained 2127.44 for computational complexity while the data complexity is 264 and memory complexity is 27. To the best of our knowledge, it is the first biclique attack on the full CLEFIA-128 lightweight block cipher. Also, we show that MITM attack in the way of using partial matching with precomputation and recomputation technique can reduce the data complexity of the attack to only 2 known plaintext-ciphertext pairs.

Optimization of Security and Privacy- Preserving Data Using an IoT CLEFIA Based Security LFSR

Abstract: Over the recent years, several smart applications like RFID's, sensor networks, including industrial systems, critical infrastructures, private and public spaces as well as portable and wearable applications in which highly constrained devices are interconnected, typically communicating wirelessly with one another, working in concert to accomplish some task. Advanced safety and security mechanisms can be very important in all of these areas. Lightweight cryptography enables secure and efficient communication between networked smart objects. The CLEFIA algorithm is a suitable lightweight cryptographic algorithm used in medium security systems. In order to increase safety and security mechanisms, modify CLEFIA are proposed which uses the Linear Feedback Shift Register (LFSR) to overcome the security weakness of the CLEFIA algorithm against attacks. In this paper an implementation of modify CLEFIA algorithm using C++ programming language. We have also compared the results with the standard CLEFIA.

Multiple Impossible Differential Cryptanalysis of Block Cipher CLEFIA and ARIA

Abstract: CLEFIA is a 128-bit block cipher which is proposed by SONY corporation and ARIA is a 128-bit block cipher which is selected as a standard cryptographic primitive. In this paper, we introduce new multiple impossible differential cryptanalysis and apply it to CLEFIA using 9-round impossible differentials proposed in [7], and apply it to ARIA using 4-round impossible differentials proposed in [11]. Our cryptanalytic results on CLEFIA and ARIA are better than previous impossible differential attacks.