Date: Tue, 17 Mar 2015 11:18:51 -0700 From: Mehmet Erol Sanliturk <m.e.sanliturk@gmail.com> To: Pedro Giffuni <pfg@freebsd.org> Cc: dennis.hamilton@acm.org, freebsd-numerics@freebsd.org Subject: Re: Random number generators Message-ID: <CAOgwaMs3Wz7JSx7R%2Bm0ikSV6_kknaRn%2BV6ZF01cjLL3S4j-VJg@mail.gmail.com> In-Reply-To: <55086E2D.9080806@FreeBSD.org> References: <7CBD7758-9472-4A2E-8065-EC6E68EE8DAB@FreeBSD.org> <20150317060310.GA21975@troutmask.apl.washington.edu> <F6137E2C-FDF2-46B3-BFC2-1975AFA40951@FreeBSD.org> <00a001d060d7$0077f100$0167d300$@acm.org> <55086E2D.9080806@FreeBSD.org>
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On Tue, Mar 17, 2015 at 11:10 AM, Pedro Giffuni <pfg@freebsd.org> wrote: > Hi Dennis; > > On 03/17/15 12:22, Dennis E. Hamilton wrote: > >> There is a lot of discussion about qualities of Random Number generators >> on cryptography lists. MT is not a good choice for that, but it might not >> need to be important for other applications. >> >> There has been some recent work, PCG, that has attracted some attention, < >> http://www.pcg-random.org/>. There are good videos explaining what the >> approach is about as well. PCG also has implementations in C. (It is >> under the Apache License 2.0 too: <https://github.com/imneme/pcg-c-basic>; >> for a minimal family and <https://github.com/imneme/pcg-c>; for ones with >> extended capabilities.) >> >> The analysis of what does and doesn't work, and how passing diehard is >> too easy, is also valuable. >> >> If you are serious about crypto grade randomness, libc is probably not >> the answer. Generally, I don't think reliance on a single generator for >> general purpose use and for cryptographic quality is going to work well. >> This is a very context-sensitive situation and addressing specific threat >> models against cryptographic PRGs is a very different matter from wanting >> unpredictable and good quality pseudo-randoms for simulations and other >> purposes. >> > > The pcg-random link seems to be down now but for crypto, we have > arc4random(3) which is pretty good and about to be improved further. > > Pedro. > > _______________________________________________ > > Three of the above links are accessible from here at Izmir , in Turkey . Thank you very much . Mehmet Erol Sanliturk
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