Cryptography from the Greek words kryptos, meaning hidden, and graphein, meaning to write, describe the process involved in encoding and decoding messages, so that unauthorized individuals cannot understand them. Cryptology is the science of encryption and encompasses two sub-disciplines cryptography and cryptanalysis. Plaintext is the form that is readable by individuals or systems, and ciphertext is the form that is not readable by individuals or systems until it is decrypted. Decryption is the process of converting an encrypted message back to its readable form. Encryption is the process of converting a readable message into a form that cannot be understood by unauthorized individuals or systems. Without getting into a detailed discussion of the mathematics behind cryptography, its application as a security technology is an important consideration in managing network security. This lecture is on cryptography and network security. Welcome to the managing network security module on cybersecurity technology administration.
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