Stream ciphers are an important class of symmetric cryptographic algorithms. The eSTREAM project contributed significantly to the recent increase of activity in this field. In this paper, we present a survey of the eSTREAM project. We also review recent time/memory/data and time/memory/key trade-offs relevant for the generic attacks on stream ciphers.

-It is demonstrated that usual time-memory trade-offs offer no asymptotic advantage over exhaustive search. Instead, trade-offs between time, memory, and parallel processing are proposed. Using this approach it is shown that most searching problems allow a trade-off between C,, the cost per solution, and C,,,, the cost of the machine: doubling C,,, increases the solution rate by a factor of fou...

In this work we consider generic algorithms to find nearcollisions for a hash function. If we consider only hash computations, it is easy to compute a lower-bound for the complexity of near-collision algorithms, and to build a matching algorithm. However, this algorithm needs a lot of memory, and makes more than 2 memory accesses. Recently, several algorithms have been proposed without this mem...

This article discusses what ethicists have called “unacceptable trade-offs” in health policy choices related to universal health coverage (UHC). Since the fiscal space is constrained, trade-offs need to be made. But some trade-offs are unacceptable on the path to universal coverage. Unacceptable choices include, among other examples from low-income countries, to expand coverage for services wit...

this article discusses what ethicists have called “unacceptable trade-offs” in health policy choices related to universal health coverage (uhc). since the fiscal space is constrained, trade-offs need to be made. but some trade-offs are unacceptable on the path to universal coverage. unacceptable choices include, among other examples from low-income countries, to expand coverage for services wit...

Many architecture features are available for improving the performance of a cache-based system. These hardware techniques include cache memories, processor stalling characteristics, memory cycle time, the external data bus width of a processor, and pipelined memory system, etc. Each of these techniques affects the cost, design, and performance of a system. We present a powerful approach to asse...

Since the original publication of Martin Hellman’s cryptanalytic time-memory trade-off, a few improvements on the method have been suggested. In all these variants, the cryptanalysis time decreases with the square of the available memory. However, a large amount of work is wasted during the cryptanalysis process due to so-called “false alarms”. In this paper we present a method of detection of ...