Re: [bitcoin-dev] The first successful Zero-Knowledge Contingent Payment

2016-02-26 Thread Tier Nolan via bitcoin-dev
On Fri, Feb 26, 2016 at 11:45 PM, Gregory Maxwell wrote: > Why not use the single-show-signature scheme I came up with a while > back on the Bitcoin side to force the bitcoin side to reveal a private > key? > > >

Re: [bitcoin-dev] The first successful Zero-Knowledge Contingent Payment

2016-02-26 Thread Gregory Maxwell via bitcoin-dev
On Fri, Feb 26, 2016 at 11:33 PM, Tier Nolan via bitcoin-dev wrote: > That is very interesting. > > There has been some recent discussion about atomic cross chain transfers > between Bitcoin and legacy altcoins. For this purpose a legacy altcoin is > one

Re: [bitcoin-dev] The first successful Zero-Knowledge Contingent Payment

2016-02-26 Thread Tier Nolan via bitcoin-dev
That is very interesting. There has been some recent discussion about atomic cross chain transfers between Bitcoin and legacy altcoins. For this purpose a legacy altcoin is one that has strict IsStandard() rules and none of the advanced script opcodes. It has a requirement that Bob sends Alice

[bitcoin-dev] Fwd: The first successful Zero-Knowledge Contingent Payment

2016-02-26 Thread Gregory Maxwell via bitcoin-dev
On Fri, Feb 26, 2016 at 11:06 PM, Sergio Demian Lerner wrote: > Congratulations! > > It a property of the SKCP system that the person who performed the trusted > setup cannot extract any information from a proof? > > In other words, is it proven hard to obtain

Re: [bitcoin-dev] The first successful Zero-Knowledge Contingent Payment

2016-02-26 Thread Sergio Demian Lerner via bitcoin-dev
Congratulations! It a property of the SKCP system that the person who performed the trusted setup cannot extract any information from a proof? In other words, is it proven hard to obtain information from a proof by the buyer? On Fri, Feb 26, 2016 at 6:42 PM, Gregory Maxwell via bitcoin-dev <

[bitcoin-dev] The first successful Zero-Knowledge Contingent Payment

2016-02-26 Thread Gregory Maxwell via bitcoin-dev
I am happy to announce the first successful Zero-Knowledge Contingent Payment (ZKCP) on the Bitcoin network. ZKCP is a transaction protocol that allows a buyer to purchase information from a seller using Bitcoin in a manner which is private, scalable, secure, and which doesn’t require trusting

[bitcoin-dev] Bitcoin Vaults.

2016-02-26 Thread Emin Gün Sirer via bitcoin-dev
At the 3rd Bitcoin Workshop being held in conjunction with the Financial Cryptography Conference in Barbados, my group will be presenting a new idea for improving Bitcoin wallet security and deterring thefts today. The write-up is here: