Ceaser's Cipher and Vigenere Cipher

Computer Security Assigment

1. Decrypt the following message in python.

HUKHZ MVYCH SVYAO HAJHU UVAIL JVTWB ALKIF ZAHAB YLOLO HZWHZ ZLKAO YVBNO TVYLI HAASL ZHUKW LYPSZ AOHUF VBOHC LPUNV SKAOV BNOFV BILAD PJLOP ZOLPN OAHUK OLJVT LZUVD MYVTA OLZAV YTPUN VMPZL UNHYK VMDOP JODLI LHYAP KPUNZ HUKNY LHADL HYPUL ZZPZV UOPTV YPDVB SKDHR LOPTO PZUHT LPZWL YLNYP UMYVT SVYKV MAOLY PUNZI VVRMP CLJOH WALYV UL

Your program should decrypt the above ciphertext and display the plaintext.

2. Encrypt a message with Vigenere Cipher in python.

Your program should read a plaintext and a key, encrypt the plaintext with the key and display the ciphertext.