Steganography is the branch of information hiding for secret communication. The simplest and widely used steganography is the LSB based approach due to its visual quality with high embedding capacity. However, LSB based steganography techniques are not secure against statistical steganalysis mainly χ2 attack and Regular Singular (RS) attack. These two staganalysis can easily estimate the hidden...

The problem of detecting linear attacks on industrial systems is presented in this paper. object attacked by attack the wireless communication process from sensors to controller with simulated mathematical model (stochastic dynamical and random noises). matrices are calculated ensure that Kullback-Leiber (K-L) algorithm passed. With these matrices, window limited cumulative SUM (WL-CUSUM) finit...

In this paper, we apply multiple linear cryptanalysis to a reduced round RC6 block cipher. We show that 18-round RC6 with weak key is breakable by using the multiple linear attack.

We address the problem of attack detection and attack correction for multi-output discrete-time linear time-invariant systems under sensor attack. More specifically, we focus on the situation where adversarial attack signals are added to some of the system’s output signals. A ‘security index’ is defined to characterize the vulnerability of a system against such sensor attacks. Methods to comput...

We discuss the security of the block cipher Camellia against differential attack and linear attack. The security of Camellia against these attacks has been evaluated by upper bounds of maximum differential characteristic probability (MDCP) and maximum linear characteristic probability (MLCP) calculated by the least numbers of active S-boxes which are found by a search method[2]. However, we fou...

In this work we study the security of Chaskey, a recent lightweight MAC designed by Mouha et al., currently being considered for standardization by ISO/IEC and ITU-T. Chaskey uses an ARX structure very similar to SipHash. We present the first cryptanalysis of Chaskey in the single user setting, with a differential-linear attack against 6 and 7 rounds, hinting that the full version of Chaskey wi...

This paper reports on the improved and multiple linear cryptanalysis of reduced round Serpent by mean of a branch-and-bound characteristic search within the algorithm. We first present a 9-round linear characteristic with probability 1 2 + 2−50 that involves a reduction of the estimated data complexity of the best reported attack by a factor of 16. Then, we investigate the possibility to take a...

Feedback with Carry Shift Registers (FCSRs) have previously been available in two configurations, the Fibonacci and Galois architectures. Recently, a generalized and unifying FCSR structure and theory was presented. The new ring FCSRs model repairs some weaknesses of the older architectures. Most notably, the carry cell bias property that was exploited for an attack on the eSTREAM final portfol...

This paper describes a novel approach for image encryption using stream cipher algorithm based on non linear combination generator. This work aims to enhance the security of encrypted image. The work is based on the use of several linear feedback shifts registers whose feedback polynomials are primitive and of degrees are all pair wise cop rimes combined by resilient function whose resiliency o...