History of Encryption

Cryptanalysis is the art of breaking cryptosystems---seeing through the disguise even when you're not supposed to be able to. Cryptology is the study of both cryptography and cryptanalysis. Today's cryptosystems are divided into two categories: symmetric and asymmetric. Symmetric crypto systems use the same key (the secret key) to encrypt and decrypt a message, and asymmetric cryptosystems use one key (the public key) to encrypt a message and a different key (the private key) to decrypt it and all of today's algorithms fit within those two categories. Asymmetric cryptosystems are also called public key cryptosystems. We have shown that the field of Cryptography has evolved tremendously since the Assyrian and Egyptian time, and as the technology progresses and computers become faster and advanced, it will be easier to cultivate the power of distributed processing and break the different encryption algorithms such DES or triple DES, thus Cryptology is an evolving field.