Re: [bitcoin-dev] Improving JoinMarket's resistance to sybil attacks using fidelity bonds

2019-08-02 Thread Adam Gibson via bitcoin-dev
reposted due to wrong email address: I'd just like to repeat something I said years ago but is undoubtedly lost now: > > ### Today's low cost for sybil attacks > > A paper on JoinMarket [Möser, Malte and Rainer Böhme. “Join Me on a > Market for Anonymity.” (2016).] calculates the requirement of s

Re: [bitcoin-dev] bustapay BIP :: a practical sender/receiver coinjoin protocol

2019-01-29 Thread Adam Gibson via bitcoin-dev
ZmnSCPxj, thanks, responses inline. On 28. 01. 19 5:14, ZmnSCPxj wrote: > Good morning Ryan and Adam, > >> [UIH2 snipped] > > Perhaps I am being naive, but I seem, the B2EP and similar do not need to > worry about UIH2. > > From the github discussion: > >> "UIH2": one input is larger than any

Re: [bitcoin-dev] bustapay BIP :: a practical sender/receiver coinjoin protocol

2019-01-27 Thread Adam Gibson via bitcoin-dev
do this; whether it's feasible in that specific wallet situation or not is up to them; whether they want to go hog wild and control percentages of UIH1 and UIH2 and whatnot is there business, or they can totally ignore it - but without it being mentioned in the BIP, they may not even think of it. A

Re: [bitcoin-dev] bustapay BIP :: a practical sender/receiver coinjoin protocol

2019-01-26 Thread Adam Gibson via bitcoin-dev
Ryan and list, I want to add some commentary to this (BIP79) to see if we can get further in standardizing this idea. When I first mulled it over I thought it too impractical, but its virtue of steganographic hiding means only minimal uptake is still enormously interesting and worth pursuing; that

Re: [bitcoin-dev] Question regarding Confidential Transactions

2016-02-13 Thread Adam Gibson via bitcoin-dev
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 In case it helps: The elements alpha sidechain uses a different address format, which includes an ECDH pubkey used for creating an ECDH shared secret. That shared secret is used to seed a RFC6979 prng, which allows both sides to generate the blinding f