Security - Lab1

Contents
Cryptos
Steganography
Cryptanalysis

Crypto Basics
Write a program that encrypts and decrypts using the following algorithms (one algorithm for each one of them):
Substitution Cipher
Transposition Cipher
Rotor Machines or Simple XOR
http://www.crypto-it.net/eng/simple/index.html

Steganography Basics
Image: https://stylesuxx.github.io/steganography/
Audio: Deep Sound (http://jpinsoft.net/deepsound)
Covert channels: Tunnelshell (ICMP)
https://betterprogramming.pub/a-guide-to-video-steganography-using-python-4f010b32a5b7

Cryptanalysis
Decode the following data:
“Chyrljuuh, j lxvyuncn cajwbvrbrxw fxdum rwludmn cqn bnwmna’b jwm anlnrena’b ljuu-brpwb, oanzdnwlh, brpwju bcanwpcq, anjmjkrurch, rwcnalnyc bcjcrxw wdvkna, crvn xo xarprw, dapnwlh, wdvkna xo yjacb rw cqn brpwju, wdvkna xo ldaanwc yjac, wdvkna xo unccnab rw ldaanwc yjac, Tnwwpadyyn mrblarvrwjwc (cx bcjcn fqrlq tnh fjb knrwp dbnm - CGV rw cqrb ngjvyun) jwm Padwmbcnuudwp (AWO rw cqrb ngjvyun). Cqrb fjb juu cajwbvrccnm nw lujra jwm oxuuxfnm kh cqn nwlryqnanm vnbbjpn-bnccrwp (KTC rw cqrb ngjvyun), cqn nwlryqnanm vnbbjpn jwm orwjuuh cqn nwm xo vnbbjpn brpwju.”