Re: My attempt to break Rijndael (SAT-attack)

Thorsten Kiefer <toki782@xxxxxxxxxxxxxxxx> wrote:
I did some research on breaking Rijndael.
I converted the Rijndael algorithm into a SAT-instance.
Then I added the 1-literal clauses of the plaintext and the key.
Then I ran my favorite SAT-solver on this instance, and the result was
the correct encryption of the plaintext with the given key.

Is this surprising?

Now what more intersting :
I only add the 1-literal clauses of the plaintext and the ciphertext.
Now the solution should contain the correct key.
At the moment my SAT-solver does not terminate in finite time for this
constellation.

Do you think this is surprising? I don't.

I call this the SAT-attack.

Is anyone interested ? Shall I provide links to my programs ?

Nah. But you may be interested in algebraic attacks.

--
Kristian Gjøsteen
.

Relevant Pages

  • My attempt to break Rijndael (SAT-attack)
    ... I did some research on breaking Rijndael. ... Then I added the 1-literal clauses of the plaintext and the key. ... the correct encryption of the plaintext with the given key. ... I only add the 1-literal clauses of the plaintext and the ciphertext. ...
    (sci.crypt)
  • Re: My attempt to break Rijndael (SAT-attack)
    ... I converted the Rijndael algorithm into a SAT-instance. ... Then I added the 1-literal clauses of the plaintext and the key. ... Then I ran my favorite SAT-solver on this instance, ... I only add the 1-literal clauses of the plaintext and the ciphertext. ...
    (sci.crypt)