There are potentially few useful entropy sources on an isolated system with its peripherals removed that has just booted (for example), so a cat walking across the keyboard can be used to strengthen the randomness at little cost. It's mostly defense-in-depth.
Sean On Mon, Jan 22, 2018 at 1:59 AM, Bastien Teinturier via zapps-wg < zapps...@lists.z.cash.foundation> wrote: > It's a good point, and I was wondering why this "manual input" entropy is > needed. > I don't understand what it adds to the entropy implicitly grabbed from the > system by the executable. > If we assume that an adversary is able to monitor the system and replicate > the entropy of the random generator used in the code, that adversary is > probably able to grab the input to the process as well right? > I'm interested in learning more about why you felt it was necessary to ask > the user to provide some random input. > > Cheers, > Bastien > > On Sat, Jan 20, 2018 at 2:04 PM, Daira Hopwood via zapps-wg < > zapps...@lists.z.cash.foundation> wrote: > >> On 18/01/18 13:46, Bastien Teinturier via zapps-wg wrote: >> > Powers of Tau Attestation >> >> Notice that PowersOfTau_2.jpg leaks the additional entropy provided >> to the computation. That's ok, it uses operating system entropy as >> well; just noting that future participants might want to avoid that. >> >> -- >> Daira Hopwood ⚧Ⓐ >> >> > > > -- > > [image: stratumn-logo.jpg] > > > Bastien Teinturier > > Senior Software Engineer > > Stratumn SAS, 1 bis Cité Paradis, 75010 Paris, France > > +33 6 28 57 71 59 <+33%206%2028%2057%2071%2059> • bast...@stratumn.com • > stratumn.com <https://stratumn.com/careers> > > We are hiring <https://stratumn.com/careers> • Read about us > <http://blog.stratumn.com> • Twitter <https://twitter.com/stratumnhq> >