3 ms·
NSA did persuade them to weaken DES by shortening the key size. The "magic S-boxes" were chosen to be resistant to differential cryptanalysis (which was success
by staunton 3y ago
NSA did persuade them to weaken DES by shortening the key size. The "magic S-boxes" were chosen to be resistant to differential cryptanalysis (which was successfully kept secret for decades to come) but that doesn't change the fact NSA had the means to break DES by brute force.