[Cryptography] quantum computers & crypto

cherry cherry at cpal.pw
Wed Nov 3 21:37:48 EDT 2021

> On 11/2/21 3:40 PM, Ray Dillinger wrote:
>> As I understand it there are reasons
>> to believe most symmetric crypto that's safe from conventional attacks
>> with key length N is equally safe from QC attacks with key length 2N.

On 11/3/21 12:07 PM, cherry wrote:
> since ChaCha and Salsa are based on irreversible operations, quantum 
> calculations just not work on them, and the same is doubtless true for 
> many other symmetric encryption protocols.  They should be completely 
> unaffected.
> Some symmetric encryption algorithms will be affected.  I don't 
> understand AES well enough to say whether it will be affected or not.

Sorry, I got confused.

The above is nonsense.

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