![]() ![]() You can use nagra 2 cards to open any encryption (irdeto,viaccess,cryptoworks,powervu,others),since you can modify codespace to your needs,and use embedded algos as needed. The point is you can learn something in the process,which might be invaluable. Why would you think they developed CSA v3 with 128 bits keys for? they know computer power moves fast past today's limits.Īt the same time,your statement is true since the first day there was a software implementation of CSA (freedec).Īt the time,a breakthrough,and a warning for security companies.Īll you are saying is well known,and eventually everything phase out. We could have 7 different S-box tables (where the Xor are included) this will save a litle bit of computation time.īut if we to a lookup table with input of 00 00 00 00 00 00 00 00 and go over the complete CW space 2^48 (huge table on a SSD drive)Ĭould it then be possible "just" xor the CW with the input payload to have the CW to give the result for the input payload? Since each block of 8 rounds do XOR on the CW first with 06 then later with 05 etc. On FPGA Permutation does not exist (it's just wires)īC does take the 64 bit payload in at top and then you will do all the combination of CW to get 64 bit out in the bottom (we only need 24bit) I recall someone did an analyse of the Cudabiss and found the time for threads of the BC vs SC are like 100:1.Īlso on FPGA the absolute resource killer are the BC and in there it's the S-box killing resource/performance. This does mean you only need to the first 4 rounds each time the blue counter starts over, this will reduce the BC time to a factor 52/56ĭifferent study show that the BC are the one taking absolute moste time/space when doing BF. ![]() If you look at the image below you will see BC ONLY use the green part of the CW for the first 4 rounds. One small shortcut I did find on the BC while back are like this:ĭue to we do have 2 chksum in the cw and it's like a low 3+1 and a high cw 3+1 (total 6+2) it's very logic to divide them as 2 counters a CW low and a CW high each of 2^24. ![]()
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