A plain text use caesar cipher to encrypt plain text where the key is a→f and the ciphertext is: “Nk mj mfi fsdymnsl htsknijsynfq yt xfd, mj bwtyj ny ns hnumjw, ymfy nx, gd xt hmfslnsl ymj twijw tk ymj qjyyjwx tk ymj fqumfgjy, ymfy sty f btwi htzqi gj rfij tzy.” Use decryption technique to find out the actual plain text.

1. Use the random substitution cipher below to encrypt the following message: Virtual Event. Write the final code in 4 letter blocks. Original A B |C|D EF GHIJKLMN ОР QRST UVW XYZ Maps to LFNIRD TPSE QJAY G MZB XK WU CVHO Answer:

Given the Vigenère ciphertext below, what is your best guess for the key length and why     IGDLK MJSGC FMGEP PLYRC IGDLA TYBMR KDYVY XJGMR TDSVK ZCCWG ZRRIP UERXY EEYHE UTOWS ERYWC QRRIP UERXJ QREWQ FPSZC ALDSD ULSWF FFOAM DIGIY DCSRR AZSRB GNDLC ZYDMM ZQGSS ZBCXM OYBID APRMK IFYWF MJVLY HCLSP ZCDLC NYDXJ QYXHD APRMQ IGNSU MLNLG EMBTF MLDSB AYVPU TGMLK MWKGF UCFIY ZBMLC DGCLY VSCXY ZBVEQ FGXKN QYMIY YMXKM GPCIJ HCCEL PUSXF MJVRY FGYRQ

Use python: Write a script to decrypt the following encrypted message (using exclusive or) : iBIAU\x0c[E@@\x0cNCAN\x0cAE@EXM^U\x0cNM_I\x01t\x0cAEH\x01BEKDX\x0cXCBEKDX\x02\x0 cmOXEZMXI\x0cAE__E@I\x0cHIJIB_I\x0c_U_XIA\x0cMX\x0cI@IZIB Submission Requirements: Submit one single file containing all scrip code and running screenshots