[Cryptography] Exotic Operations in Primitive Construction
Richard Outerbridge
outer at interlog.com
Wed Sep 30 23:09:43 EDT 2020
> On 2020-09-30 (274), at 16:57:43, John Denker via cryptography <cryptography at metzdowd.com> wrote:
>
> On 9/28/20 9:50 PM, Sid Spry wrote:
>
>> bit rotation does not seem closely
>> related to any other easy to analyze operation. But I have no explanation for
>> why it feels this way.
>>
>> Perhaps the only more irregular operation I can think of is a lookup.
>
> Let's talk about DES in particular. At the time it came along, it was
> common to implement crypto in SSI (small scale integration) hardware.
All wrapped up in an IBM bus & tag connected mainframe raised floor peripheral :)
__outer
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