Both Substitution cipher technique and Transposition cipher technique are the types of Traditional cipher which are used to convert the plain text into cipher text.
Substitution Cipher Technique:
In Substitution Cipher Technique plain text characters are replaced with other characters, numbers and symbols as well as in substitution Cipher Technique, character’s identity is changed while its position remains unchanged.
Transposition Cipher Technique:
Transposition Cipher Technique rearranges the position of the plain text’s characters. In transposition Cipher Technique, The position of the character is changed but character’s identity is not changed.
Difference between Substitution Cipher Technique and Transposition Cipher Technique:
|S.NO||Substitution Cipher Technique||Transposition Cipher Technique|
|1.||In substitution Cipher Technique, plain text characters are replaced with other characters, numbers and symbols.||In transposition Cipher Technique, plain text characters are rearranged with respect to the position.|
|2.||Substitution Cipher’s forms are: Mono alphabetic substitution cipher and poly alphabetic substitution cipher.||Transposition Cipher’s forms are: Key-less transposition cipher and keyed transposition cipher.|
|3.||In substitution Cipher Technique, character’s identity is changed while its position remains unchanged.||While in transposition Cipher Technique, The position of the character is changed but character’s identity is not changed.|
|4.||In substitution Cipher Technique, The letter with low frequency can detect plain text.||While in transposition Cipher Technique, The Keys which are nearer to correct key can disclose plain text.|
|5.||The example of substitution Cipher is Caesar Cipher.||The example of transposition Cipher is Reil Fence Cipher.|
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