[Cryptography] NSA versus DES etc.... was: iOS 8

[Tony Arcieri]

>
> >  All NSA did was change the S boxes and drop the key from 64 to 56 bits.
>

Lucifer supported a 128-bit key size, and IBM had it deployed for various
commercial purposes using 128-bit keys before DES was standardized.

The NSA originally pushed for a 48-bit key size, when IBM wanted at least
64-bits. They split the difference and used 56-bits, and chalked the 8-bits
between 56-bits and 64-bits up to "checksum bits"

-- 
Tony Arcieri
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.metzdowd.com/pipermail/cryptography/attachments/20140923/7b566aca/attachment.html>