Suchergebnisse

In this paper we analyse realization of a coprocessor which supports counting of discrete logarithm on elliptic curves over the field , where is the large prime, in FPGA. Main idea of the realization is based on using modules which are able to add the points and have relatively small resources' requirements. We showed the simplified case in which we know most significant bits of key and we used one-dimensional Gaudry–Schost method. We also generalize that case and analyse the case when unknown bits are given in many disjoint intervals. To do this we propose using a multidimen-sional Gaudry–Schost method. At the end of this article we show the solution which provides best trade-off between throughput and price of a device.
Keywords: cryptology, elliptic curves, discrete logarithm on elliptic curves (ECDLP), attacks with partial knowledge, multi-dimensional Gaudry-Schost algorithm.

Th is article is dedicated to a special category of structures that may be called "astronomical instruments", constructed in the Inca Empire (ca. 14-16 c. AD). As mentioned in some sources, these were intended for use by a small group of priests-astronomers. A good example is Intimachay in Machu Picchu, which was recently re-designated as an astronomical observatory, far more complex and precise than was previously believed. Th e discovery of Inkaraqay – El Mirador, a second structure, even more complicated than Intimachay and erected for the purpose of precise astronomical observation, confi rms the importance of the knowledge of the skies in the running of the Incan Empire.

En 1550 el tercer obispo de la diócesis de Nicaragua murió asesinado por los hijos del ex-gobernador, Rodrigo de Contreras. La causa directa de este delito fue la enemistad personal entre los asaltantes y la víctima, sin embargo el incidente formaba parte de un fenómeno amplio, compuesto por la explotación de indios, los confl ictos internos en la sociedad hispana de la colonia y la gran política imperial en el Nuevo Mundo recién conquistado.