Encryption machine 4bits by liardnos

liardnos

18 / 3

5th Jan 2018

11th Oct 2018

this machine uses a 16-bit key (there is already one in the machine). the encryption machine is on the right, the decryption machine on the left. to encrypt a data I use an "adaptive" system that prevents basic decryption.

encryption

Comments

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  pyelias 9th Mar 2019
  Frequency analysis still works, you just have to do it on blocks of 2 instead of 1
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  liardnos 11th Oct 2018
  for that reason we need 2 diferent machine to encrypt end uncrypt
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  liardnos 11th Oct 2018
  it's not -5 every time
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  liardnos 11th Oct 2018
  it's a little more complicate, the sibstitution is depending from the last 4 bits
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  pyelias 11th Jul 2018
  So it's a bigram substituion cipher. Still not too complicated.
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  liardnos 18th Jun 2018
  it is more complicated, when we encrypt a message the machine goes to the line corresponding to the first line, in this line there are two info: the first corresponds to the encrypted version of this line, the dexia has an offset of the head of reading which makes it possible to modify the next result (like enigma but instead of shifting of 1 each time the offset goes of 0-15 according to the character asked) if you arrive has cracked my encryption warn me
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  pyelias 10th Jun 2018
  What algorithm does this use? It looks like just a simple substitution cipher, which shouldn't be too hard to crack.
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  liardnos 7th Jan 2018
  the crmc and filt is the key and the brick and filt is the message
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  NoVIcE 6th Jan 2018
  The crmc & filt block is the "key" you need to decrypt it? Its cool!