Topic: [ANN][XST] Stealth-Coin.com | Tor | StealthText, World's first anonymous SMS Tx! - page 55. (Read 748429 times)

All righty. Since longandshort was posting the IRC chat including some of the stuff I was asking, I figure I'll post my perspective for anyone that might actually care.

The conversation in the bitcoin channel was somewhat misleading and really didn't answer me satisfactory.  Frankly, it's not their job and, as longandshort posted, they don't really know if it can be implemented or not given the limited information presented.  They're also looking at it from the perspective of bitcoin.

Since I was mentioning Monero in there, one of their devs invited me into one of their channels where I was able to ask a few more questions.

Regarding the paper I posted that outlines how Chandran signatures can be traceable etc. Apparently it has not even been peer reviewed. So I'm left with the assumption that while it could be implemented, it would be questionable as to whether or not it would be sound.

So I was thinking about the whitepaper and what it actually said.  Two things stood out to me, the first that it was talking about CN and then about burning Stealthcoins to Stealthsend coins.  One of the key issues is the blockchain.  For example, CN and bitcoin blockchains are completely incompatible. In addition, trying to implement something like Chandran sigs into a bitcoin core would be a massive undertaking.  I mention the bitcoin core since it appears the source for Stealthcoin is based on that given the copyright notice although there's probably been some mods to it as well.  Either way, I simply don't see how Stealthsend could be added into the blockchain after the fact especially given the time frame.

Given all that, the only way I can see potentially having Stealthsend in the time frame outlined is if it was based on CN with its own blockchain or perhaps some sort of dual blockchain scheme.  That would sort of fit with the whitepaper talking about burning one for the other.  In addition, changing CN to use Chandran sigs would be a much easier task but as I said, whether or not it would be cryptographically sound would still be up for debate.

And with that, I'm done with this Chandran sigs/Stealthsend topic as I spent far too much time looking into something that the devs should have been more clear about.  Good luck to everyone.

thats a good point mate i hadn`t thought of it like that

Before addressing the criticisms raised in this thread, I would like to express my sincere appreciation for these criticisms. Although some believe the manner in which they have been introduced may not be optimal to promote civil discourse, they are valuable criticisms nevertheless, and help to strengthen crypto-currencies in general. It is far better to address weaknesses in crypto systems during implementation than it is to address attacks after deployment.

Chandran signatures [1] make use of a common reference string. The common reference string generator (CRSGen) is a necessity for a model that does not require a random oracle, as described in [1]. CRSGen produces a string that is used as an input to a key generation function. The key generation function produces the user's public-private key pair. This key pair has specific properties in that it is a member of a particular mathematical group. In principle, key generation can be replaced by a cryptographic one-way function if the random oracle assumption is introduced.

Admittedly a more difficult issue to address is one of "unlinkability/untraceability", which boils down to the potential for a double spend. In short, Chandran signatures require the generation of a secret random parameter, g, that serves as an input to a "commitment" to a specific key in the key ring. This commitment basically identifies the public key from which the money is spent. The problem is that any number of g can be produced, creating the potential for any number of commitments to the specific public key.

In reality, this same issue exists with CryptoNote ring signatures except that the CryptoNote system incorporates a key image, I, into signing and verification, such that I can only ever be used once. A similar approach can be taken with Chandran signatures. As presented in [1], a key image I can be incorporated into Step 3 of signing and appended to the final signature. In addition to other parameters, Step 3 commits to the public keys of a subset of the ring. Just as with CryptoNote ring signatures, such a modification would commit to the key image and prevent its use for double-spends.

[1] Chandran N., et al. Ring Signatures of Sub-linear Size Without Random Oracles. ICALP 2007, LNCS 4596, pp. 423–434, 2007.


-- Hondo

The thing I hate about you LongAndShort is the way you give Coca-Cola to your scum and your best teddy bear to Oxfam, and expect us to lick your frigid fingers for the rest of your frigid life.

http://www.youtube.com/watch?v=BqoGcC4S5jk

Hey moron!!! Your shitdow coin is dead, go and save it..you know why its called shitdowcash right??? Cuz its all shit like you..so just stfu and fuck off, OK?? Otherwise you will see..

Probably he is looking for a new investors for "ShadowCash"...fail

Only idiots selling at this point
Sell me idiots, sell me hahahahaha...
I'll grab your cheap XSTs

Don't you ever get tired ?
You realize how lame you are ?
Let's suppose you are perfectly and totally wright. OK ?
What's the whole point of your spent energy to stay day and night on this forum trying to bring more and more evidence?
Can you please explain me that ? What drives you to have so much involvement in this ?
I fail to understand.

stealthsend is proven to be vaporware yet you're still here supporting it..hmm and i'm the crazy one..stop while you still have a chance and become a better person and do the right thing and just not support such filth or you are just as bad! Attacking me is futile i have all the facts laid out and you will just keep seeing them from me as long as you keep attacking me. you are not getting away with this rotten scam this industry needs more people like me and less like you!

Let me play devils advocate here and say you are right.  Which let me just say I highly doubt. Why do you care?  Why are you here?  What's the point? I see scam coins all the time and I don't bother spending a good few days trying to convince people on anything. Give it up mate we all see through it.

your spelling is overwhelming

games over devs a fraud community is putrid pack up and learn your lesson!

stealthsend is proven vaporware by at least 6 professionals now!

Lolwut you just trolled yourself? Hahaha

deny it all you want the facts are overwelming

Only vaporware around here is your dick.

its all here https://botbot.me/freenode/bitcoin-wizards/2014-10-10/?msg=23217017&page=2

so i'm here basically telling you all that there is something wrong here and over and over i've stated the same thing just 100 different ways for all y'all to grasp its failed but you see the smart people got it.

and the experts are saying things like

"surprised to hear that the thing whitepapered before is somehow being traded already; I should really someday stop being surprised by these things."

and " it's the normal course of things in the altcoin world - you first launch so that you can mine a bucketload at low diff, then you make vague hand-wavey promises, then you sell a bit on the back of the claims, wait for it to tank, buy back in, push out a whitepaper with little technical merit, and offload"

with regards to most the altcoin space and specifically this coin! who do you trust more? Some fools in a thread constantly avoiding the fact this coin is vapoware and is pretty much as of right now a straight up scam or some professionals saying its vaporware! cmon get head in it and see whats happeneing here! its projects like this that are killing this wholeindustry because we allow it to go on and on like this without any rebuttal. you are either for it or against it!

"You can't really honest effort yourself through something that is just not applicable, and probably not through not knowing what you're doing. ... and you speak of integrity, but launching some speculative asset when you've not done the work?  I don't think that is something that speaks of integrity."

morning to you 

HI FUCKER YOU EVER LEARN PHONETICS? OK SOUND IT OUT "OPEN SOURCE" NOW DEFINE IT AND SHUT THE FUCK UP!!!

Your account is obviously run by a group of FUDDERS. You never go to sleep and the quality of your English varies on whichever of your group is posting. From unintelligible to Gollum.

As I'm sure gmaxwell would admit, there's more than one way to skin a cat. If we get a better product at the end of the day all the better IMO.

Morning All!