We present an index calculus algorithm which is particularly well suited to solve the discrete logarithm problem (DLP) in degree 0 class groups of curves over finite fields which are represented by plane models of small degree. A heuristic analysis of our algorithm indicates that asymptotically for varying q, “almost all” instances of the DLP in degree 0 class groups of curves represented by pl...

Recently, lay and scientific reports have raised concerns regarding the radiation doses associated with CCTA. These published data remain confusing for the nonphysicist, given the complexity of measuring radiation exposure and estimating risk. Radiation imparted by CT is most easily described by the dose-length product (DLP), a summary measure of the integral of radiation dose and scan length. ...

Recently, the well-known Diie-Hellman key exchange protocol was extended to real quadratic congruence function elds in a non-group based setting. Here, the underlying key space was the set of reduced principal ideals. This set does not possess a group structure, but instead exhibits a so-called infrastructure. The techniques are the same as in the protocol based on real quadratic number elds. A...

In the entertainment industry’s quest for the “suspension of disbelief,” two primary sensory stimuli have been engaged: sight and sound. Since the advent of digital audio, a number of new multitrack digital sound formats have appeared in the motion picture industry, all in an attempt to achieve the ultimate audio experience. However, visual presentation has not advanced at the same pace as the ...

BACKGROUND AND PURPOSE CT guidance may improve precision for diagnostic and therapeutic spinal injections, but it can increase patient radiation dose. This study examined the impact of reducing tube current on patient radiation exposure and the technical success for these procedures, by using axial acquisitions for short scan lengths and eliminating nonessential imaging. MATERIALS AND METHODS...

Image processing is widely used in many applications, including medical imaging, industrial manufacturing and security systems. In these applications, the size of the image is often very large, the processing time should be very small and the real-time constraints should be met. Therefore, during the last decades, there has been an increasing demand to exploit parallelism in applications. It is...

We are going to observe special algebraic Turing machines designed for different assignments of cryptography such as classical symmetric encryption, public key algorithms, problems of secure key exchange, development of hash functions. The security level of related algorithms is based on the discrete logarithm problem (DLP) in Cremona group of free module over finite commutative ring. In the ca...

Many parallel applications are designed to conceal parallelism from the user. In this paper, we investigate a diierent approach where the user controls many tasks running in parallel. The idea is to let a user accomplish his goal more quickly by trying competing alternatives in parallel (or-parallelism) and by working on subgoals in parallel (and-parallelism). To help the user manage a large nu...

Text classification is used for the purpose of preventing the leakage of the data which is highly important within the institution through unallowed ways. The results obtained from the text classification process should be integrated into the DLP architecture immediately. The data flowing through the net requires instant control and the flow of the sensitive data should be prevented. The use of...