Encryption is a security method in which information is encoded in such a way that only authorized user can read it. It uses encryption algorithm to generate ciphertext that can only be read if decrypted.
AES is an iterative rather than Feistel cipher. It is based on ‘substitution–permutation network’. It comprises of a series of linked operations, some of which involve replacing inputs by specific outputs (substitutions) and others involve shuffling bits around (permutations). Interestingly, AES performs all its computations on bytes rather than bits. Hence, AES treats the 128 bits of a plaintext block as 16 bytes.
Types of Encryption
There are two types of encryptions schemes as listed below:
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Symmetric Key encryption
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Public Key encryption
Data Encryption is encouraged, as it keeps a company’s data secure and safe from unauthorized hands or in the event of a data breach. For example, if you send an email, you can use encryption technology to convert your mail contents into scrambled data so that no one other than the receiver will understand the mail.
1. Symmetric key encryption algorithm uses same cryptographic keys for both encryption and decryption of cipher text.
2. Public key encryption algorithm uses pair of keys, one of which is a secret key and one of which is public. These two keys are mathematically linked with each other.
