Public key cryptography and network security application

ABSTRACTToday with the developing technology computer usage is increased. The usershave possibilities for shopping, communication and financial procedures over Internet.The usage of computer networks called attention the person who wants to benefit. Thehackers try to reach secret information and manage bank accounts. The cryptologistscreate security solutions with using cryptography techniques. The public keycryptography is the one of security methods and I prepared my thesis with using thismethod.It was mentioned to Cryptography?s general aim. Public key cryptography?sdefinition was made. Information was given about its necessities and algorithms. Diffie-Hellman and RSA cryptosystems were examined. At RSA cryptosystem, keyproduction and security was examined. The historical developments of cryptosystemswere glanced over. Key distribution scenarios were examined. Then was passed to thesecurity application over network. X509 authentication service and certificates wereargued. PGP was researched. The items of IP and WEB security were mentioned. Thesoftware, which uses RSA algorithm, was developed.Key Words: Cryptography, Public-Key Cryptosystems, RSA, KeyManagement, and Network Security.II