CHAPTERS 1 & 2 TJADEN, EARLY CHAPTERS OF THE CODE BOOK, INTRODUCTION TO CRYPTOOL AND SIMPLE CRYPTOGRAPHIC TECHNIQUES Dr. Suzanne Buchele (some content. - ppt download
Vernam-Vigenere cipher | Definition, Advantages, Disadvantages, & Facts | Britannica
Cryptography and Network Security Chapter 2 - ppt download
Playfair Cipher with Examples - GeeksforGeeks
cryptology - Vigenère ciphers | Britannica
Substitution Ciphers - the Origins and Applications of Cryptography
PDF) Cryptographic methods and development stages used throughout history
Vigenère Cipher (automatic solver) | Boxentriq
CypherMatrix Method / Dynamic Hash Function and Bit-Conversion
Lorenz cipher - Wikipedia
Vigenère cipher - Wikipedia
TheHackersManual2015RevisedEdition - Стр 7
Daily Star - 2021-03-08
Cryptography and Network Security Chapter 1 - ppt download