I am not certain about Braille, but what I am sure of is there is no incremental process to guessing a 64 bit datum that changes every single execution. I typically don't state a fact unless I am willing to die if I am incorrect. At least https://en.m.wikipedia.org/wiki/Blind_return_oriented_programming seems to state so. I dont fully trust wikipedia. On Sat, Oct 14, 2017 at 3:06 AM Philip Guenther <guent...@gmail.com> wrote:
> On Sat, Oct 14, 2017 at 12:49 AM, Luke Small <lukensm...@gmail.com> wrote: > >> If that's true, then why has Theo been speaking of the brop problems, >> when they begin with an incremental canary discovery that becomes all but >> impossible to guess when it becomes a random 4 byte datum each time rather >> than a datum that remains the same each restart? >> > > Because we are creatively optimistic pessimists: we can imagine > possibilities for how other might be able to get around our defenses. > Please watch review the presentation and read the source! > > > >> Braille should already be impossible to run on such a system, unless >> maybe a restart was not the result of an exec. >> > > The word "should" indicates that you are not certain. How would you go > about proving it? What would you do if you couldn't? > > Philip Guenther > >
