Difference between Block Cipher and Transposition Cipher
Last Updated :
28 Apr, 2024
1. Block Cipher :Â
Block Cipher is the symmetric key cipher used for converting the plain text into cipher text. It uses a simple substitution process or sometimes the permutation process where the block of plain text is substituted with arbitrary bit of cipher text.
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2. Transposition Cipher :Â
Transposition Cipher rearranges the position of the characters of plain text. It changes the position of the character but it does not change the identity of the character.Â
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Here are differences between Block Cipher and Transposition Cipher:
Block Cipher |
Transposition Cipher |
In block cipher, a block of plain text is considered as a whole. |
In transposition cipher, plain text is written down as a sequence. |
It produces a cipher text block of equal length to plain text. |
It reads the sequences as rows. |
In block cipher, error in transmitting one block does not affect other blocks. |
In transposition cipher, error in one letter will affect the whole cipher text. |
Encryption process is slow in block cipher. |
Encryption process is fast in transposition cipher. |
Security of block cipher depends on the design of encryption function. |
It can be made more secure by performing more than one transposition. |
Plain text is broken into blocks and algorithm operates on each block independently. |
Plain text is broken into letters and algorithm operates on each letter independently. |
The complexity of block cipher is simple. |
While transposition cipher is more complex. |
In block cipher, characters lose their identity. |
Characters don’t lose their identity in transposition cipher. |
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