A Fault Analytic Method against HB+

The search for lightweight authentication protocols suitable for low-cost RFID tags constitutes an active and challenging research area. In this context, a family of protocols based on the LPN problem has been proposed: the so-called HB-family. Despite the rich literature regarding the cryptanalysis of these protocols, there are no published results about the impact of fault analysis over them. The purpose of this paper is to fill this gap by presenting a fault analytic method against a prominent member of the HB-family: HB+ protocol. We demonstrate that the fault analysis model can lead to a flexible and effective attack against HB-like protocols, posing a serious threat over them

Contaminação com patógenos em sistemas hidropônico: como aparecem e como evitar.

bitstream/CNPH-2009/31446/1/cot_31.pd

Irrigação de hortaliças em solos cultivados sob proteção de plástico.

Retencao de agua no solo; Qualidade da agua; Temperatura da agua; Metodos de irrigacao; Sulcos; Aspersao; Gotejamento; Xique-xique; Fitas ou tripas; Convencional; Frequencia de irrigacao; Volume de agua a aplicar; Aplicacao de fertilizantes via agua de irrigacao em estufas; Sistema venturi; Sistema de diferencial de pressao ou do tanque; Bombas injetoras; Principais fontes de nutrientes; Recomendacoes de fertirrigacao para algumas hortalicas cultivadas sob protecao de plastico ou PVC; Tomate; Pepino; Pimentao.bitstream/item/107336/1/CNPH-DOCUMENTOS-10-IRRIGACAO-DE-HORTALICAS-EM-SOLOS-CULTIVADAS-SOB-PROTECAO-DE-PLASTICO-FL-07820.pd