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_6

6. Classic Cryptography

Marius Iulian Mihailescu¹   and Stefania Loredana Nita¹

(1)

Bucharest, Romania

 

This chapter provides an introduction to classic cryptography. It explains the symmetric class of ciphers, whereby the encryption key is the same for both operations—encryption and decryption. Such ciphers are Caesar, Vigenère, Hill, and others. The main goals of this chapter are to give you a clear understanding of the main symmetric cryptographic mechanisms and to provide you with proper implementations in MATALB. These ciphers are not secure and so are not used anymore, but they ...