Introduction to cryptography, Computer Network Security

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INTRODUCTION TO CRYPTOGRAPHY

Cryptography

The word cryptography is derived from Greek words kryptos, which means hidden and graphein, meaning to write, this is the process of making and by using codes to secure transmission of the information.

Encryption

Encryption is the procedure of converting an original message into a form which is not readable by unauthorized individuals.

Decryption

Decryption is process of converting cipher text message back into plaintext.

Cryptanalysis

Cryptanalysis is process of obtaining original message from encrypted message without knowing the algorithms and keys used to perform encryption.

Cryptology

Cryptology is science of encryption that combines cryptography and cryptanalysis both


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