Decim is a hardware oriented stream cipher submitted to the ECRYPT stream cipher project. The design of Decim is based on both a non linearly filtered LFSR and an irregular decimation mechanism called the ABSG. While the initial call for contributions required hardware-oriented stream ciphers to manage 80-bit secret keys and 64-bit public initialization, designers have been invited to demonstra...

Differential Fault Attack (DFA) is presently a very well known technique to evaluate security of a stream cipher. This considers that the stream cipher can be weakened by injection of the fault. In this paper we study DFA on three ciphers, namely Grain v1, Lizard and ACORN v3. We show that Grain v1 (an eStream cipher) can be attacked with injection of only 5 faults instead of 10 that has been r...

RC4 has remained the most popular software stream cipher since the last two decades. In parallel to cryptanalytic attempts, researchers have come up with many variants of RC4, some targeted to more security, some towards more throughput. We observe that the design of RC4 has been changed a lot in most of the variants. Since the RC4 structure is quite secure if the cipher is used with proper pre...

LEX is a stream cipher proposed by Alex Biryukov. It was selected to phase 3 of the eSTREAM competition. LEX is based on the Advanced Encryption Standard (AES) block cipher and uses a methodology called Leak Extraction, proposed by Biryukov himself. However Dunkelman and Keller show that a key recovery attack exists against LEX. Their attack requires 2 bytes of keystream produced by the same ke...

Kondisi Internet of Things saat ini yang cenderung tanpa menggunakan fitur keamanan dapat menjadi tantangan untuk realisasi things terutama di bidang privasi dan kerahasiaan data, khususnya pada modul sensorik berdaya rendah yaitu Bluetooth Low Energy. Adanya celah Energy perhatian besar jaringan ini, terhubung dengan public. Data dari perangkat diretas dimodifikasi oleh peretas. Dengan menerap...

Differential Fault Attack (DFA) has received serious attention in cryptographic literature and very recently such attacks have been mounted against several popular stream ciphers for example Grain v1, MICKEY 2.0 and Trivium, that are parts of the eStream hardware profile. The basic idea of the fault attacks consider injection of faults and the most general set-up should consider faults at rando...

We propose a new block cipher, DESL (DES Lightweight extension), which is strong, compact and efficient. Due to its low chip size constraints DESL is especially suited for RFID (Radio Frequency Identification) devices. Our proposed DESL is based on the classical DES (Data Encryption Standard) design, however, unlike DES it uses a single Sbox repeated eight times. This approach makes it possible...

The stream cipher Salsa20 was introduced by Bernstein in 2005 as a candidate in the eSTREAM project, accompanied by the reduced versions Salsa20/8 and Salsa20/12. ChaCha is a variant of Salsa20 aiming at bringing better diffusion for similar performance. Variants of Salsa20 with up to 7 rounds (instead of 20) have been broken by differential cryptanalysis, while ChaCha has not been analyzed yet...

The cube attack is a powerful cryptanalytic tool for the analysis of stream ciphers, which until recently were investigated in a blackbox scenario with a minimal consideration to their internal and polynomial structures. In this paper, we analyze the lightweight stream cipher WG5, which offers 80-bit security, using cube attacks in a non-blackbox polynomial setting employing the division proper...

The increasingly widespread use of electronic devices necessitates efficient stream ciphers providing high-throughput encryption with minimal resource usage. MICKEY-128 2.0 is a recent hardware-oriented synchronous stream cypher with a 128-bit key, proposed to the ECRYPT Stream Cipher Project. Using a novel mathematical interpretation of the algorithm, we present a method of parallelizing the s...