![]() In polygram substation cipher, rather than replacing each alphabet with another, the alphabet’s Block is replaced with another block of alphabets. For example, replace A with x, E with B, S with A, etc., or replace A with E, x or L, B with T, A, Z, etc. The substitution alphabet is replaced with the fixed one. Homophonic Substitution CipherĪ homophonic substitution cipher is similar to a monoalphabetic cipher the only difference is in monoalphabetic, we replace the alphabet with any other random alphabet except the original alphabet wherein in homophonic substitution cipher, the alphabet is replaced by a fixed alphabet or set of alphabets. Mono alphabetic cipher causes difficulty to crack the message as there are random substitutions and a large number of permutations and combinations are available. ![]() C can be replaced by A, B, and D to z, etc. That is, A can be replaced by any other alphabet from B to Z. In monoalphabetic, each alphabet in plain text can be replaced by any other alphabet except the original alphabet. Replace each alphabet with a specified number down.Īs Caesar cipher and a modified version of Caesar cipher is easy to break, monoalphabetic cipher comes into the picture.So here, the plain text is EDUCBA, and the ciphertext Is FEVDCB.Ī modified version of the Caesar cipher algorithm is as follows. For example, EDUCBA and number for the replacement are 1, so E will be replaced by F, D will be replaced by E, U will be replaced by V, C will be replaced by D, B will be replaced by C, and A will be replaced by B. Repeat the process for all alphabet in plain text.Ī Modified Version of Caesar Cipher: This cipher works the same as Caesar cipher the only difference is – in Caesar cipher, each alphabet is replaced by three-place down wherein in a modified version of Caesar cipher, a user decides the number to replace the alphabet, and this number will be constant.Replace each alphabet with 3 places down.So here, the plain text is EDUCBA and ciphertext Is HGXFED. So that E will be replaced by H, D will be replaced by G, U will be replaced by X, C will be replaced by F, B will be replaced by E, and A will be replaced by D. As a Caesar cipher, each alphabet is replaced by three places down. In Caesar’s cipher, each alphabet in the message is replaced by three places down. It is a very weak technique for hiding text. In Caesar cipher, the set of plain text characters is replaced by any other character, symbols, or numbers. Web development, programming languages, Software testing & others 1.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |