COMPARISON OF CLASSICAL CRYPTOGRAPHY METHODS

ZAINAB OBAID¹ , ARKAN SABONCHI² , Bahriye AKAY²

Cryptography is the science which deals with methods and theories of encryption and decryption. Cryptography is divided into two parts: Modern and classic methods. In this study, we employed some common classical encryption algorithms including Caesar, Vigenere, Vernam, Hill, Playfair algorithms. The overall structure of these algorithms have been explained and an analysis have been performed on the images encoded with Base64. Images and text data are passed to the algorithms and encrypted data is obtained using crypto key. The performances of the algorithms were analyzed based on time consumption for encryption/decryption, the memory consumption, the processor consumption, time complexity, and space complexity, adaption to the system, flexibility and confidence rate. Once the performance of the algorithms obtained, the advantages and disadvantages of these algorithms were evaluated.

Keywords
Cryptography, Cryptography Algorithms, Performance Analysis, Information Security, Image Cryptography,