Cryptographic coin flipping, now in Keybase

Post by wildmanx » Tue, Mar 12, 2019, 6:41 AM UTC

jlrubin wrote: post #79

wildmanx wrote: post #73

>> Who invented commitment schemes? > ~My wife~ Not sure. Seriously? You work professionally in the crypto space and don't know where this is from? Or don't feel it's important to attribute such fundamental ideas to the appropriate people? If you really don't know, a quick google would have educated you. But what I fear to be more likely is that you apparently just don't give a damn. For anybody remotely interested,…

I think you're unfairly punishing him for not knowing; it's a bit tough to find. I'll give you that the joke -- pinning it on his wife -- is unfunny. None of the folks you mentioned, I believe, invented commitment schemes. Whit Diffie has a good history here: https://ee.stanford.edu/~hellman/publications/24.pdf . So these innovations would have been ~1 academic generation prior. Of course, the GCHQ probably invented…

Post by ummonk » Tue, Mar 12, 2019, 6:47 AM UTC

oh_sigh wrote: post #46

Is this a problem with commitment schemes? I want a heads to come up. I add a couple of hacked members to the group, so there are 3 honest members, and lets say 3 coordinated dishonest members. Everyone shares their commitment hash, and the dishonest members share their actual commitments amongst themselves. Once everyone has the commitment hashes, the 3 honest members broadcast their commitment. The three dishonest…

Post by maxtaco » Tue, Mar 12, 2019, 10:46 AM UTC

betterunix2 wrote: post #63

malgorithms wrote: post #27

I'd be curious if people on HN would want a zero knowledge survey and voting system inside Keybase, and if so, what would it look like? The background: we talk about it sometimes as a solution to a real problem: in certain teams and workplaces, people can be afraid to give honest feedback (who dares to submit an "anonymous" survey to HR?), but Keybase may be in a unique position to let people in a group give written…

OT: One of the things I find interesting is that "zero knowledge" has become a buzzword. On the one hand it is frustrating, because when cryptographers say "zero knowledge" we mean something very specific and rigorously defined (a survey protocol cannot be zero knowledge because the results of a survey do reveal something about the respondents' inputs). On the other hand, the fact that non-experts are comfortable wit…

Post by lrvick » Tue, Mar 12, 2019, 11:06 AM UTC

lrvick wrote: post #86

I'll add my usual reminder here that keybase is a proprietary walled garden that made up its own crypto standards and protocols on many levels leading to dangerous design flaws like this one: https://github.com/keybase/keybase-issues/issues/1946

Post by nickik » Tue, Mar 12, 2019, 12:43 PM UTC

lrvick wrote: post #88

sympodius wrote: post #84

Earlier quoted context omitted.

I thought Keybase was open source? Released under the New BSD (3 Clause) License?

The clients are. The platform they all run on top of is centralized, made up its own irresponsibly insecure key handling and crypto protocols, and is proprietary.