3 ms·
I've brought up the S-Box strengthening several times before, but it's important to note that the NSA pushed IBM to reduce the key length in DES. IBM wanted 6
by akira2501 13y ago
I've brought up the S-Box strengthening several times before, but it's important to note that the NSA pushed IBM to reduce the key length in DES. IBM wanted 64 bits, NSA wanted 48, and we all got 56 as a compromise; not entirely egalitarian work.
- marshray 13y agoWhat I've been told is that 56 bits is pretty close to its actual effective security in the presence of differential cryptanalysis. So the key length was 'right sized' and it ended up having truth-in-labeling after all.