In Chapter 4: Number Theory and Cryptography, we learned a lot of knowledge and mechanism related to Computer Network Security and Data Encryption.
Data encryption converts information into a different form, or code, so that only those with a secret password or key can decipher it. Data that has been encrypted is often referred to as ciphertext, whereas plaintext denotes data that has not been encrypted.
At the moment, organisations use encryption as one of the most common and efficient data security techniques. Asymmetric encryption, also referred to as public-key encryption, and symmetric encryption are the two primary types of data encryption.
Data encryption is used to safeguard the privacy of digital data while it is being stored on computer systems and transmitted over the internet or other computer networks. Modern encryption algorithms, which are crucial to the security of IT systems and communications, have replaced the dated data encryption standard (DES).
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