Cryptography and Cryptanalysis in MATLAB: Creating and Programming Advanced Algorithms

© Marius Iulian Mihailescu and Stefania Loredana Nita 2021

M. I. Mihailescu, S. L. NitaCryptography and Cryptanalysis in MATLABhttps://doi.org/10.1007/978-1-4842-7334-0_9

9. Block Ciphers: DES and AES

Marius Iulian Mihailescu¹   and Stefania Loredana Nita¹

(1)

Bucharest, Romania

 

This chapter discusses block ciphers, such as the Data Encryption System (DES) and the Advanced Encryption System (AES) . Different aspects, such as substitution/permutation, are discussed as design techniques used with block ciphers. This approach is based on FIPS 46-3 for DES and FIPS-197 for AES.

An important aspect to be noted is the fact that DES was withdrawn on May 19, 2005. A historical list of the reasons can be consulted in [1]. The DES algorithm is not used anymore ...