Thanks for the explanation Sean. Indeed it's better to hide it then for next participants, good catch Daira!
On Mon, Jan 22, 2018 at 12:56 PM, Sean Bowe <s...@z.cash> wrote: > 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> >> > > -- [image: stratumn-logo.jpg] Bastien Teinturier Senior Software Engineer Stratumn SAS, 1 bis Cité Paradis, 75010 Paris, France +33 6 28 57 71 59 • 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>
