Implementação em Tempo Constante de Amostragem de Gaussianas Discretas

  • Jheyne N. Ortiz UNICAMP
  • Diego F. Aranha UNICAMP
  • Ricardo Dahab UNICAMP

Resumo


Algoritmos de amostragem Gaussiana discreta sobre reticulados demandam métodos discretos de amostragem sobre inteiros. Considerando que a amostragem de DΛ,σ,c é um dos passos na encriptação em certos criptosistemas modernos baseados em reticulados, surge a preocupação por implementações resistentes a ataques por canais laterais. Este trabalho apresenta e discute implementações dos métodos Knuth-Yao e Ziggurat em tempo constante comparando-as com suas versões de tempo variável. A implementação em tempo constante do Knuth-Yao é aplicada na amostragem sobre reticulados.

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Publicado
09/11/2015
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ORTIZ, Jheyne N.; ARANHA, Diego F.; DAHAB, Ricardo. Implementação em Tempo Constante de Amostragem de Gaussianas Discretas. In: SIMPÓSIO BRASILEIRO DE SEGURANÇA DA INFORMAÇÃO E DE SISTEMAS COMPUTACIONAIS (SBSEG), 15. , 2015, Florianópolis. Anais [...]. Porto Alegre: Sociedade Brasileira de Computação, 2015 . p. 239-252. DOI: https://doi.org/10.5753/sbseg.2015.20098.

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