Node capture is considered as one of the most critical issues in the security of wireless sensor networks. A popular approach to thwart the problem relies on the detection of events that arise during the attack such as the removal of a node for instance. However, certain attacks, such as side-channel attacks, might be furtive and defeat this type of defense. This work clarifies this question by...

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Cryptographic devices are vulnerable to the nowadays well known side channel leakage analysis. Secret data can be revealed by power analysis attacks such as Simple Power Analysis (SPA), Differential Power Analysis (DPA) and Correlation Power Analysis (CPA). First, we give an overview of DPA in mono-bit and multi-bit cases. Next, the existing multi-bit DPA methods are generalized into the propos...

Embedded systems are suggestive targets for code injection attacks in the recent years. Software protection mechanisms, and in general computers, are not usually applicable in embedded systems since they have limited resources like memory and process power. In this paper we investigate side channel characteristics of embedded systems and their applicability in code injection attack detection. T...

The paper demonstrates how traffic load of a shared packet queue can be exploited as a side channel through which protected information leaks to an off-path attacker. The attacker sends to a victim a sequence of identical spoofed segments. The victim responds to each segment in the sequence (the sequence is reflected by the victim) if the segments satisfy a certain condition tested by the attac...

We show that a randomized addition-subtraction chains countermeasure against side channel attacks is vulnerable to SPA attack, a kind of side channel attack, under distinguishability between addition and doubling. A side channel attack is an attack that takes advantage of information leaked during execution of a cryptographic procedure. The randomized addition-subtraction chains countermeasure ...

Algebraic side channel attack is a major technique to solve the ciphers and the various side channel attacks. A side channel attack is a type of attack based on information gathered from the application of a cryptosystem, relatively than brute force. Common classes of side channel attack comprise, Timing attack ,Power monitoring attack ,Acoustic cryptanalysis ,Differential fault analysis ,Data ...

A number of papers on side-channel attacks have been published where the side-channel information was not exploited in an optimal manner, which reduced their efficiency. A good understanding of the source and the true risk potential of an attack is necessary to rate the effectiveness of possible countermeasures. This paper explains a general approach to optimize the efficiency of side-channel a...

Many CAPTCHA proposals have shortcomings in their design or implementation that make themmuch weaker than intended. In this paper we study Captcha2, a commercial algorithm, as a means of showing typical flaws that make many CAPTCHAs prone to successful low-cost attacks. The attack we present makes no use of any AI techniques, not affecting the resilience of the original AI problem this CAPTCHA ...