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This paper presents a fast implementation to compute the scalar multiplication of elliptic curve points based on a General-Purpose computing on Graphics Processing Units (GPGPU) approach. A GPU implementation using Dan Bernstein's Curve25519, an elliptic curve over a 255-bit prime eld complying with the new 128-bit security level, computes the scalar(More)
In the current controversial context caused by the disclosure of classified details of several top-secret United States and British government mass surveillance programs to the press by former NSA contractor Edward Snowden, issues of data privacy, anonymity, unlinkability, forward secrecy and deniability have raised to public prominence. In this work we(More)
Su-Doku, a popular combinatorial puzzle, provides an excellent test-bench for heuristic explorations. Several interesting questions arise from its deceptively simple set of rules. How many distinct Su-Doku grids are there? How to find a solution to a Su-Doku puzzle? Is there a unique solution to a given Su-Doku puzzle? What is a good estimation of a(More)
The subject of this paper, an improbable implementation of a recently standardized cryptographic hash function on a thirty-five-year-old microcomputer, may strike some as unusual and recreative at best. In the tedious discipline of the process, however, lessons were learned in implementation trade-offs for basic cryptographic primitives which may prove(More)
This paper presents early results of a (very) experimental implementation of the elliptic curve and stream cipher calculations of the Networking and Cryptography library (NaCl), on the TRS-80 Model I. Needless to say, the demonstration that such a library, which has been optimized for many modern platforms including leading edge desktops, servers and,(More)
robot scheduling with time-window constraints using a critical path approach. The cutting stock problem with mixed objectives: Two heuristics based on dynamic programming. A comparative study of exact algorithms for the two dimensional strip packing problem. An improved heuristic and an exact algorithm for the 2D strip and bin packing problem. application(More)