Cryptanalysis on classical cipher based on Indonesian language
Rini Marwati, Kartika Yulianti · Journal of Physics Conference Series · 2018
Cryptanalysis is a process of breaking a cipher in an illegal decryption. This paper discusses about encryption some classic cryptography, breaking substitution cipher and stream cipher, and increasing its security. Encryption and ciphering based on Indonesian Language text. Microsoft Word and Microsoft Excel were chosen as ciphering and breaking tools.