What is feistel cypher? How it works in a cryptographic algorithm?
Subject Computer and Network Security
NU Year Set: 4.(b) Marks: 1+4 Year: 2015

Feistel cipher is a symmetric structure used in the construction of block ciphers, named after the German IBM cryptographer Horst Feistel; it is also commonly known as a Feistel network. A large set of block ciphers use the scheme, including the Data Encryption Standard.

Encryption has a long history dating back to when the ancient Greeks and Romans sent secret messages by substituting letters only decipherable with a secret key. Join us for a quick history lesson and learn more about how encryption works.

In today’s edition of HTG Explains, we’ll give you a brief history of encryption, how it works, and some examples of different types of encryption

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