What is encryption and role in network communication?


The encryption is the process of changing sensible data into unsensible data (encrypting or encoding data and messages transmitted or communicated over computer network).
Decryption reverses the process. Cryptography which comes from the greek word krypto (means hidden) and graphein (means to-write), is the science of secret communication.
It is a process that includes various tools, techniques and standards to ensure that the messages are unreadable when in-transit between two or more network nodes.
In computing, unencrypted data is also known as plaintext, and encrypted data is called ciphertext.
The formulas used to encode and decode messages are called encryption algorithms, or ciphers.
The role of encryption is to ensure confidentiality, concealing the content of the message by translating it into a code.
The encryption is used to ensure the integrity and authenticity (verifying the sender of a message and indicating that the content has not been changed)

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