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E-commerce means buying and selling goods and services across the Internet. Secured communication in e-commerce, across unsecured medium, such as the Internet, represents one of the major components in a domain of providing necessary securitycritical demands, so the flow of information could go in a secure way. | Yugoslav Journal of Operations Research Vol 19 (2009), Number 1, 185-194 DOI:10.2298/YUJOR0901185P REDUCING E-COMMERCE RISKS USING DIGITAL CERTIFICATES Miloš PIŠČEVIĆ Serbian Armed Forces, Belgrade milos.piscevic@gmail.com Dejan SIMIĆ Faculty of Organizational Sciences, Belgrade dejan.simic@fon.bg.ac.yu Received: December 2007 / Accepted: May 2009 Abstract: E-commerce means buying and selling goods and services across the Internet. Secured communication in e-commerce, across unsecured medium, such as the Internet, represents one of the major components in a domain of providing necessary securitycritical demands, so the flow of information could go in a secure way. The Internet, as a global computer network must provide five major security services: confidentiality, data integrity, authentication, availability, and non-repudiation of information. Without guaranteeing aformentioned security goals, risks may be very high in e-commerce systems. A possible way to reduce these risks is to use digital certificates. Digital certificates provide a means of proving identity in electronic transactions, and from the point of view of computer communication they are irreplacable, but nevertheless they provide a good mechanism for implementing the major part of this security goal, and therefore, their usage in e-commerce is the major topic of this paper. Keywords: Cryptography, digital certificates, X.509, e-commerce. 1. INTRODUCTION E-commerce represents a set of technologies and procedures which automates business transactions via electronic devices. Information is transferred via e-mail, EDI (Electronic Data Interchange) system or through a World Wide Web service – the Internet. In general, e-commerce stands for shopping and selling information, products 186 M. Piščević, D. Simić / Reducing E-Commerce Risks and services through a computer network and it is a support for any type of business transactions through digital infrastructure. Modern computer networks are, .
