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Infrastructure of public keys
Bědajánek, Ondřej ; Malý, Jan (referee) ; Pust, Radim (advisor)
The subject of my thesis dscribes function and principles of the public key infrastructure as well as certificate authority. Under the operation system Linux was created self signed certificate authority. Web interface was devoloped in PHP for the purpose of the generation, distribution and rejection certificates. Configuration files for OpenVPN are included in the thesis and wireless security is achived by OpenVPN.
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Implementation of certification authority and digital signature
Troják, Martin ; Koutný, Martin (referee) ; Lambertová, Petra (advisor)
This master´s thesis deals with problems of certification authorities and digital signature. There are analyzed principles of digital certificates and certification authorities. It describes the the most widely used cryptosystems and hash functions, which are used in communications with certificates and digital signature. Analysis is focused on Public key infrastructure standard, which describes rules of creating of certification authority and digital signature. There is also described detailed principle of digital signature. Next chapters deals with studying of protocol SSL, principles of functions and usage of SSL. Practical part of this thesis realizes certification authority and information system. There is shown used software and configuration of it. Last part describes procedures during using aplication and her realization.
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Electronic signature and its use in accounting
Guzý, Ladislav ; Mejzlík, Ladislav (advisor) ; Singerová, Jana (referee)
Diploma thesis is focused on matters of electronic signatures and their possible usage in accounting and business process. The paper is divided into two parts. Subject of the first part is general analysis of terminology and characteristics of electronic signature, certificates and certification authorities and time stamps, including analysis of strengths and weaknesses of these services. At the end of this theory part are outlined some of the most common choices of using electronic signature in accounting system. In second part are analysed results of research, which was performed by sending questionnaire to a number of randomly chosen companies.
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Digital certificates and certification authority
ČELEDA, Stanislav
This work deals with the possibilities of using digital certificates and certification authorities or analysis of alternatives and their use to create secure communication in information systems. In practical examples is demonstrated by the CA implementation on different platforms and generate various types of digital certificates. Based on the findings is made recommendations for choosing the appropriate certification authority.
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Internal Certification Authority
Kolb, Jiří ; Pavlíček, Luboš (advisor) ; Bumbala, Jan (referee)
With the rising number of internet users emerged the need for mutual authentication and secure communication. In the open environment of the Internet, this service is provided by a trusted third party using asymetric cryptography. This trusted third party - called Certification Authority - provides identification of the communication partners and the security of their communication through certificates it issues. Many large companies use certification authorities today. The goal of my thesis is the design and implementation of a CA for a small company, along with an evaluation of the benefits of introducing this new technology.
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Comparison of selected certificate authorities in the Czech Republic
Tencer, Peter ; Toman, Prokop (advisor) ; Pavlíček, Antonín (referee)
This thesis deals with basic principles of electronic signature and functions of certificate authorities, which is complemented with description of legislation environment in Czech Republic. The second part of the thesis includes methodology for comparison of certificate authority's functions in the field of qualified personal certificates. This methodology is afterwards applied for comparison of functions of accredited certificate authorities operating in Czech Republic and for determination of the best authority according to defined criteria and their significance weights.
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Comparison of the legislation of electronic signature in selected countries
Hautke, Tomáš ; Toman, Prokop (advisor) ; Svatá, Vlasta (referee)
Focus of this thesis is to compare legislation of electronic signature in the Czech Republic and in the USA. In first chapter are explained basic terms, such as cryptography, certificate or certification authority. Next two chapters deal with laws concerning electronic communication. In chapter about Czech legislation they are electronic signature law and electronic transactions and authorized document conversion law. Moreover, Czech Republic has to abide EU directive. Chapter about USA legislation consists of ESIGN act and UETA. Following chapter is dedicated to problems caused by imperfect legislation. Last chapter contains evaluation of described legislation.
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Electronic signature and První certifikační autorita
Suková, Lenka ; Toman, Prokop (advisor) ; Štědroň, Bohumír (referee)
This bachelor thesis deals with electronic signature and První certifikační autorita. The theoretical part is aimed at the definition of electronic signature, refers to its advantages and drawbacks and the principles of symmetric and asymmetric cryptology, on which electronic signature is based. It also describes the development of legislation governing electronic signature and provides definitions of selected concepts - certification authority and certificate. The second part deals with the companyPrvní certifikační autorita, one of the only three accredited providers of certification services in the Czech Republic. It contains an introduction of the company, its services, statistics of the Czech certificate market and statistics of the company's issued certificates. Next chapter describes the acquisition process of qualified certificate at První certifikační autorita, an assessment of the service and proposals for its improvement.
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Electronic signature for emails subscribing
Rychetský, Filip ; Toman, Prokop (advisor) ; Brechlerová, Dagmar (referee)
Práce se zabývá využitím elektronického podpisu k podepisování emailových zpráv a to přehlednou a jasnou formou s praktickými příklady. Zahrnuje obecnou charakteristiku elektronického podpisu jako takového, věnuje se kryptografickým základům, aby čtenář věděl, jakými metodami a principy je podpis zajištěn, a konkrétními možnostmi podepisování s důrazem na jednu variantu. Tato podrobněji popsaná varianta je konfrontována s dalšími možnostmi, zejména v oblasti výhod a nedostatků.
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Electronic signature in trading company
Fejfarová, Jana ; Toman, Prokop (advisor) ; Bébr, Richard (referee)
Tato práce se zaměřuje na problematiku spojenou s elektronickým podpisem v ČR. Cílem této práce je pomoci společnosti ACCOM czech, a.s. rozhodnout se pro konkrétní produkt nebo alespoň vybrat firmu, která působí na českém trhu a poskytuje služby v oblasti elektronického podpisu. Po posouzení nabídky firem pomocí multikriteriálního výběru se jako nejvhodnější zdá společnost PostSignum QCA z důvodu příznivých cen a také kvůli elektronické značce, kterou chce společnost používat pro elektronickou fakturaci. Na konci práce jsou uvedeny oblasti, ve kterých je možné EP využít.
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