TWINE is a recent lightweight block cipher based on a Feistel structure. We rst present two new attacks on TWINE-128 reduced to 25 rounds that have a slightly higher overall complexity than the 25round attack presented by Wang and Wu at ACISP 2014, but a lower data complexity. Then, we introduce alternative representations of both the round function of this block cipher and of a sequence of 4 r...

It is one of the important factors in iterative block ciphers design that proper rounds are used to resist differential analysis, linear analysis and many other kinds of attack. Block ciphers usually adopt loop codes in software and repetition structures in hardware in order to reduce complexity and cost. This paper presents an effective fault-electromagnetic attack which can change the rounds ...

The conventional cryptography solutions are ill-suited to strict memory, size and power limitations of resourceconstrained devices, so lightweight cryptography solutions have been specifically developed for this type of applications. In this domain of cryptography, the term lightweight never refers to inadequately low security, but rather to establishing the best balance to maintain sufficient ...

KeeLoq is a lightweight block cipher that is massively used in the automobile industry [12, 13, 31, 32]. KeeLoq has two remarkable properties: it is periodic and has a very short block size (32 bits). Many different attacks on KeeLoq have been published in recent years [8, 15, 9, 10, 5]. In this paper we study a unique way of attacking KeeLoq, in which the periodic property of KeeLoq is used in...

We propose a lightweight block cipher that supports 128bit block size with 128-, 192and 256-bit keys, to confirm with the Advanced Encryption Standard (AES) specification. All components of LCASE are chosen to be cellular automata-based so as to achieve higher parallelism and simplify the implementation. Apart from that, the other virtues of LCASE are its high speed and cheap cost along with be...

In this paper we consider some cryptographic implications of integrated circuit (IC) printing. While still in its infancy, IC-printing allows the production and personalisation of circuits at very low cost. In this paper we present two block ciphers PRINTcipher-48 and PRINTcipher-96 that are designed to exploit the properties of IC-printing technology and we further extend recent advances in li...

This paper introduces Multi-Stage Fault Attacks, which allow Differential Fault Analysis of block ciphers having independent subkeys. Besides the specification of an algorithm implementing the technique, we show concrete applications to LED-128 and PRINCE and demonstrate that in both cases approximately 3 to 4 fault-injections are enough to reconstruct the full 128-bit key. Keywords-cryptanalys...

This thesis is dedicated to symmetric cryptographic algorithms. The major focus of the work is on block ciphers themselves as well as on hash functions and message authentication codes based on block ciphers. Three main approaches to the cryptanalysis of symmetric cryptographic algorithms are pursued. First, several block cipher constructions are analyzed mathematically using statistical crypta...

Personal data security is a cybersecurity trend that has captured the world’s attention. Governments, practitioners and academics are jointly building personal in various communication systems, including IoT. The protocol widely used IoT implementation MQTT. By default, MQTT does not provide features form of encryption. Therefore, this research was carried out on design Secure End-to-End Encryp...