With increasing use of internet and effortless copying, tempering and distribution of digital data, copyright protection for multimedia data has become an important issue. Digital watermarking emerged as a tool for protecting the multimedia data from copyright infringement. In digital watermarking an imperceptible signal "mark" is embedded into the host image, which uniquely identifie...

Access control is an important security activity that prevents undesired persons from entering secure buildings or perimeters. The advanced risk analysis presented in this paper enables distinguishing between acceptable and undesired entries based on several entry sensors, such as fingerprint readers, and intelligent methods that learn behavior from previous entries. We have extended the intell...

BACKGROUND Distinguishing epileptic from psychogenic non-epileptic seizures (PNES) often requires video electroencephalography (EEG) recording. Inpatient recording is a limited resource; some evidence suggests that short term video EEG (SVEEG) is useful, but its role in practice has yet to be evaluated. OBJECTIVE To assess the usefulness of SVEEG in the diagnosis of attack disorders. METHOD...

A recent framework for chosen IV statistical distinguishing analysis of stream ciphers is exploited and formalized to provide new methods for key recovery attacks. As an application, a key recovery attack on simplified versions of two eSTREAM Phase 3 candidates is given: For Grain-128 with IV initialization reduced to up to 180 of its 256 iterations, and for Trivium with IV initialization reduc...

In this article, we provide the first independent analysis of the (2-round tweaked) 256-bit version of the SHA-3 candidate SHAvite-3. By leveraging recently introduced cryptanalysis tools such as rebound attack or Super-Sbox cryptanalysis, we are able to derive chosen-related-salt distinguishing attacks on the compression function on up to 8 rounds (12 rounds in total) and free-start collisions...

In this paper, we analyze the security of the stream cipher Helix, recently proposed at FSE’03. Helix is a high-speed asynchronous stream cipher, with a built-in MAC functionality. We analyze the differential properties of its keystream generator and describe two new attacks. The first attack requires 2 basic operations and processes only 2 words of chosen plaintext in order to recover the secr...

Embedded exponentiation techniques have become a key concern for security and efficiency in hardware devices using public key cryptography. An exponentiation is basically a sequence of multiplications and squarings, but this sequence may reveal exponent bits to an attacker on an unprotected implementation. Although this subject has been covered for years, we present in this paper new exponentia...

The iterated Even-Mansour cipher is a construction of a block cipher from r public permutations P1, . . . , Pr which abstracts in a generic way the structure of key-alternating ciphers. The indistinguishability of this construction from a truly random permutation by an adversary with oracle access to the inner permutations P1, . . . , Pr has been investigated in a series of recent papers. This ...

In a wireless network environment, all the users are able to access the wireless channel. Thus, if malicious users exploit this feature by mimicking the characteristics of a normal user or even the central wireless access point (AP), they can intercept almost all the information through the network. This scenario is referred as a Man-in-the-middle (MITM) attack. In the MITM attack, the attacker...

‎let $g$ be a graph and $chi^{prime}_{aa}(g)$ denotes the minimum number of colors required for an‎ ‎acyclic edge coloring of $g$ in which no two adjacent vertices are incident to edges colored with the same set of colors‎. ‎we prove a general bound for $chi^{prime}_{aa}(gsquare h)$ for any two graphs $g$ and $h$‎. ‎we also determine‎ ‎exact value of this parameter for the cartesian product of ...