Account for one vigenere password class, class of objects do not have the keys of their respective owners. No object with the same plaintext encrypted, the ciphertext will be different. Encryption process is as follows: Let key as K = k1k2 ....... kn, expressly for the M = m1m2 ....... mn, the ciphertext is C = c1c2 ....... cn, where k1k2 ......... kn, m1m2 ........... mn, c1c2 ......... cn, each of which represents a letter. The letters A to Z number, from 0 to 25, then they have such a corresponding relationship between the: ci = (mi+ ki) mod26. For example, M = data security, K = best, then the first M sequence of decomposition of the growth of 4: data secu rity each section using the encryption key K = best, be sequences: EELT TIUN SMLR add the plaintext space go to get the ciphertext: EELT TIUNSMLR the need for cryptography, ciphertext letter in all uppercase letters.

vigenere.cpp

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