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National Repository of Grey Literature 3 records found  Search took 0.01 seconds. 
Side-channel cryptanalysis using deep learning methods
 Matuška, Jakub ; Martinásek, Zdeněk (referee) ; Sikora, Pavel (advisor)
Cryptographic systems are getting unbreakable on paper. Therefore attacks on the implementations using side-channels are getting in front of others. Especially when neural networks (NN) got involved in this field. With deep learning, these attacks can recover secret keys even on implementations with countermeasures. Deep learning assisted sidechannel analysis (DL-SCA) dominated this field over the statistical methods. That is why it is important to understand its concepts. This thesis will showcase these methods and introduce some new tools regarding correlation power analysis (CPA) and the training of NNs. An attack on ASCAD dataset will take place and the proposed NN to conduct this attack will be evaluated against other models using proper metrics. Lastly, improvements to SITM (See-In-The-Middle) attack using deep learning are proposed and implemented in the console application.
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Charakteristika reprodukčních vlastností hřebců působících v inseminaci
 BÚDOVÁ, Alena
One of the requirements for a successful insemination in horse breeding is the selection of quality stallions which produced ejaculate in enough quantities and of good quality. For this purpose were discovered methods of dealing with the evaluation of semen quality. In this dissertation was ejaculate evaluated by using an objective computerized method CASA, system SCA. Monitoring the quality of sperm was performed on 11 breeding stallions involved in artificial insemination fresh sperm in ZH Písek. 53 samples of ejaculate were evaluated. Volume, sperm concentration, total and progressive motility and sperm vitality were monitored. Volume of ejaculate was from 20 to 127.5 ml. Average values of sperm concentration for individual stallions were from 104.18 to 384.4 M/ml. Average values of total motility were moving by interval from 51.23 to 89.54 %. Average progressive motility was move from 12.99 to 47.12 %. At sperm vitality were discovered average results from 35.16 to 71.21 %. The average value of individual stallions was identical to the Decree of the Ministry of Agriculture, which sets minimum requirements for quality indicators for short-term preservation of semen. Also the quality of the semen of stallions was compared by age. The first group was made by stallions to 10 years old and the second group were older stallions. It was found that the younger stallions to 10 years had higher semen volume and greater sperm concentration. Stallions older over 10 years had higher levels of total and progressive motility and sperm vitality. Next ejaculate quality was evaluate by the time interval between samples. Regular taken from stallions is doing better ejaculate quality but the time interval between samples is important. The best values were found in samples with interval between the sampling 4 or more days. The worst quality of sperm was in the samples with the interval between 1-2 days.
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Brand building of firm SCA Packaging Ceska republika s.r.o.
 Velínová, Monika ; Halík, Jaroslav (advisor) ; Dibelka, Jaroslav (referee)
The aim of my bachelors work is to explain important terms which the marketers should know while wanting to build the brand successfully. I would like to outline terms as promotion, distribution, indentity and brand value. Furthermore I will minutely aim to term marketing mix and its parts. The aim of practical part is to present the firm SCA Packaging Česká republika s.r.o. and to compare the theory with brand building of this firm.
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