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Re: Scrypt using SHA-3
- To: Ryan Carboni <ryacko@gmail.com>, scrypt@tarsnap.com
- Subject: Re: Scrypt using SHA-3
- From: Colin Percival <cperciva@tarsnap.com>
- Date: Tue, 29 Apr 2014 23:55:02 -0700
- In-reply-to: <CAO7N=i2xXVeFGoOSzWNJgyUs5sevdM5k-sn-E3PVeYEDPx1o9w@mail.gmail.com>
- References: <CAO7N=i0jTBam-Lg2Nr_9-i0+1Mdr1Hrue1+d5u_YEzU7DgJfoQ@mail.gmail.com> <00000145aaf33f0f-ff171b29-0f5b-4cfd-810e-926cf50f7740-000000@email.amazonses.com> <CAO7N=i2xXVeFGoOSzWNJgyUs5sevdM5k-sn-E3PVeYEDPx1o9w@mail.gmail.com>
Hi Ryan & list,
On 04/28/14 23:37, Ryan Carboni wrote:
> Now, just a minor question about the influence of various variables for Scrypt.
>
> Would halving N and doubling r reduce CPU consumption not weaken security
> excessively? I'm only asking because my webhost focuses on CPU operations.
That would have very little effect on security. But it would also have very
little effect on the CPU time used, which is proportional to N * r * p.
--
Colin Percival
Security Officer Emeritus, FreeBSD | The power to serve
Founder, Tarsnap | www.tarsnap.com | Online backups for the truly paranoid