The Virginia cipher Plus decryption program written by Python

Virginia Code table

650) this.width=650; "src=" Http://s1.51cto.com/wyfs02/M01/78/14/wKioL1Z1WwDBEaHWAAGY7UKfZSE837.jpg "title=" 3ac79f3df8dcd100d56d833d748b4710b9122f3c.jpg "alt=" Wkiol1z1wwdbeahwaagy7ukfzse837.jpg "/>

=============================================

#维吉尼亚密码 encryption

key= ' HelloWorld '

plaintext= ' Whereisthekey '

#key = ' Relations '

#plaintext = ' Tobeornottobeth '

Ascii= ' ABCDEFGHIJKLMNOPQRSTUVWXYZ '

Keylen=len (Key)

Ptlen=len (plaintext)

ciphertext = ' '

i = 0

While I < ptlen:

j = i% Keylen

K = Ascii.index (Key[j])

m = Ascii.index (Plaintext[i])

Ciphertext + = ascii[(m+k)%26]

i + = 1

Print ciphertext

===================================================================

#维吉尼亚加密算法 decryption

key= ' HelloWorld '

ciphertext= ' Dlpcsegkshrij '

#key = ' Relations '

#ciphertext = ' ksmehzbblk '

Ascii= ' ABCDEFGHIJKLMNOPQRSTUVWXYZ '

Keylen=len (Key)

Ctlen=len (ciphertext)

plaintext = ' '

i = 0

While I < ctlen:

j = i% Keylen

K = Ascii.index (Key[j])

m = Ascii.index (Ciphertext[i])

If M < k:

M + = 26

plaintext + = Ascii[m-k]

i + = 1

Print plaintext

This article is from the "Personal Records" blog, so be sure to keep this source http://whbill.blog.51cto.com/3280780/1726430

The Virginia cipher Plus decryption program written by Python