Differential Forgery Attack Against LAC
نویسنده
چکیده
LAC is one of the candidates to the CAESAR competition. In this paper we present a differential forgery attack on LAC. We study the collection of characteristics following a fixed truncated characteristic, in order to obtain a lower bound on the probability of a differential. We show that some differentials have a probability higher than 2−64, which allows a forgery attack on the full LAC. This work illustrates the difference between the probability of differentials and characteristics, and we describe tools to evaluate the probability of some characteristics.
منابع مشابه
Cryptanalysis of some first round CAESAR candidates
ΑΕS _ CMCCv₁, ΑVΑLΑNCHEv₁, CLΟCv₁, and SILCv₁ are four candidates of the first round of CAESAR. CLΟCv₁ is presented in FSE 2014 and SILCv₁ is designed upon it with the aim of optimizing the hardware implementation cost. In this paper, structural weaknesses of these candidates are studied. We present distinguishing attacks against ΑES _ CMCCv₁ with the complexity of two queries and the success ...
متن کاملLeaked-State-Forgery Attack against the Authenticated Encryption Algorithm ALE
ALE is a new authenticated encryption algorithm published at FSE 2013. The authentication component of ALE is based on the strong Pelican MAC, and the authentication security of ALE is claimed to be 128-bit. In this paper, we propose the leaked-state-forgery attack (LSFA) against ALE by exploiting the state information leaked from the encryption of ALE. The LSFA is a new type of differential cr...
متن کاملA Universal Forgery of Hess's Second ID-based Signature against the Known-message Attack
In this paper we propose a universal forgery attack of Hess’s second IDbased signature scheme against the known-message attack.
متن کاملA Practical Universal Forgery Attack against PAES-8
PAES is an authenticated encryption scheme designed by Ye et al., and submitted to the CAESAR competition. The designers claim that PAES-8, which is one of the designs of the PAES-family, provides 128-bit security in the nonce misuse model. In this note, we show our forgery attack against PAES-8. Our attack works in the nonce misuse model. The attack exploits the slow propagation of message dif...
متن کاملOn the Security of the COPA and Marble Authenticated Encryption Algorithms against (Almost) Universal Forgery Attack
COPA is a block-cipher-based authenticated encryption mode with a provable birthday-bound security under the assumption that the underlying block cipher is a strong pseudorandom permutation, and its instantiation with the AES block cipher is called AES-COPA. Marble is an AES-based COPA-like authenticated encryption algorithm with a full security. In this paper, we analyse the security of COPA a...
متن کامل