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+--- Thread: two-key triple DES (/thread-8813.html)
two-key triple DES - MrLampe - 12-10-2019
Hey guys,
can hashcat help me with two-key triple DES (K1=K3) in any way?
I know the PT and of course the CT but literally nothing about the key. Only it is 2 x 56 = 112 bits.
Any help much appreciated. Thanks!
MrLampe
RE: two-key triple DES - undeath - 12-10-2019
(12-10-2019, 07:53 PM)MrLampe Wrote: Only it is 2 x 56 = 112 bits.
I don't know what kind of hardware you have available but with my GPU (GTX 1060) bruteforcing 112 bit on DES 14000 would take about 1.6x10^16 years at 10 GH/s.
>>> (2**112 / (10000 * 1000 * 1000)) / 60 / 60 / 24 / 365
1.6464665330209374e+16
RE: two-key triple DES - MrLampe - 12-12-2019
Hi,
thank you very much for your answer.
I have possibilities to get my hands on HPC machines. But for the first step I need to evaluate my tools. :-) ATM I really don't understand the syntax for two key 3DES in hashcat.
MrLampe
RE: two-key triple DES - undeath - 12-12-2019
My answer should have made you realise that no matter what hardware you have, there is no way you are going to crack a 112bit DES key.
RE: two-key triple DES - MrLampe - 12-12-2019
I need this Key very bad so there must be a way.
MrLampe
RE: two-key triple DES - MrLampe - 12-22-2019
Isn't this User asking the exact same question? https://hashcat.net/forum/thread-8808-post-46920.html#pid46920
Seems like there is a possible solution?
MrLampe
RE: two-key triple DES - undeath - 12-23-2019
Is it possible to attempt to crack this with hashcat? yes
Is it possible to test even a reasonably sized subset of the keyspace with hashcat? no