Topic: Shuffling Sunday ! (testing NRS 1.7.4 CoinShuffle, 10+17-01-2016 ) (Read 24527 times)

yassin54 · « **Reply #60 on:** December 21, 2015, 08:40:20 am »

Thank you and Congratulation everybody

Tweeted!! https://twitter.com/NxtCommunity/status/678861297425842176

MrCluster87 · « **Reply #61 on:** December 21, 2015, 09:51:04 am »

Yey!! Thanks EvilDave!! And Thanks all the testers!!

So it was a successful "Testing Day"!!

Thanks Yassin54 for your great support!! It's not good talking to a wall, so if the message spreads out it's a wonderful thing!!

Quote from: EvilDave on December 21, 2015, 12:41:17 am

Hi, boyz and girlz....

As usual, I'm astonishingly late with getting this out, so bear with me....

I've gone through the bounty applications, and there are 5 testers who have made a bounty application, so everyone gets 2500 NXT !
That was easy.

The lucky shufflers are:
McCluster, mystcoin, Yassin54, lopalcar and qq2536007339.
There's 2500 shiny NXT on their way to each of you.....thanks for the help

yassin54 · « **Reply #62 on:** December 21, 2015, 10:25:51 am »

Quote from: MrCluster87 on December 21, 2015, 09:51:04 am

Thanks Yassin54 for your great support!!

Sent!!

Jean-Luc · « **Reply #63 on:** December 21, 2015, 10:45:59 am »

We tested that shufflings can work, but we also need to make sure that a rogue participant cannot cause a shuffling to fail without paying a penalty for it, or make somebody else take the blame. After the source code is published in the stable release, we will ask people to try to find possible loopholes for sabotaging a shuffling, and if anyone claims to have found such a way, we should do another Shuffling Sunday to test if such attacks are really feasible.

EvilDave · « **Reply #64 on:** December 26, 2015, 07:56:11 pm »

Yep.....let's schedule a Sabotage Shuffling Sunday early in January.
We now know that the CoinShuffle functionality works well, so lets figure out ways of breaking it.

EvilDave · « **Reply #65 on:** January 07, 2016, 02:02:13 pm »

It's time for the sequel:

Shuffling Sunday II: Sabotage !

From the previous Shuffling Sunday tests, we are pretty sure that all of the CoinShuffle technology works well in 'normal' use.
But what about abnormal use ?
Nxt core devs: Jean-Luc and Riker, would like to invite everyone to attempt to break/damage/compromise Shuffling in whatever evil ways they can think of......

So, on the 2 following Sundays (that's 10 and 17 January 2016), from 12.00 UTC onwards, everyone is invited to test/break Shuffling functionality on TestNet.
All of the details on how to get onto TestNet are at the start of this thread:
https://nxtforum.org/news-and-announcements/shuffling-sunday-!-%28testing-nrs-1-7-2e-coinshuffle-13-12-2015-%29/msg203466/#msg203466
Please note that we will be testing with NRS 1.7.4 on TestNet.

The Nxt Foundation/Tennessee will provide some bounty payments: we will pay out a small bounty amount to testers for participating, as we did with the last Shuffling Sunday and provide a single bounty payment of 25,000 NXT for finding a bug/exploit in the Nxt CoinShuffling implementation.

(I'll award the participation bounty, the bug bounty will be decided by J-L and Riker, if anyone finds an exploit)

See you on Sunday....

, spread the word.

martismartis · « **Reply #66 on:** January 07, 2016, 02:19:10 pm »

Are there some public test nodes around? I know only Jones one.

Jean-Luc · « **Reply #67 on:** January 07, 2016, 06:21:58 pm »

Quote from: EvilDave on January 07, 2016, 02:02:13 pm

Nxt core devs: Jean-Luc and Riker, would like to invite everyone to attempt to break/damage/compromise Shuffling in whatever evil ways they can think of......

Note that shuffling sabotage exploits should be economically rational, i.e. cheaper to perform than the 1000 NXT it costs to break a shuffling by just missing your turn. I am already aware of one possible way to break a shuffling and blame it on someone else, but it is too computationally expensive to be practical.

Riker · « **Reply #68 on:** January 07, 2016, 06:22:33 pm »

Few more things, we are quite sure that if you work using the wallet UI you won't be able to break anything, however even if you are not a coder it would help a lot if you try the system as a user if only to generate good test data and provide feedback about the user interface.
It would be great if you can run your own testnet node. Feel free to shuffle using more than one account and more than one node at the same time. You can even try with the same account on different nodes, the blockchain should be able to handle these cases.
If you need testnxt post here.

We suspect that to really break things you'll need to review the source code and submit transactions manually (i.e. not rely on the default shuffler, perhaps try to create an evil shuffler)
To start with, checkout the 1.7.4 source code available here https://bitbucket.org/JeanLucPicard/nxt/src , I recommend that you focus on the Shuffling*.java and Shuffler.java sources under the java/nxt folder. One thing we sometimes get wrong is the validateAttachment methods in ShufflingTransaction.java, if you find something there that's a low hanging fruit.
The main algorithm is implemented in the Shuffling.process() method and the source code for blaming a cheater is in the blame() method.
In my view, if you are able to break things really badly and explain what you did we can probably provide a larger bounty.

EvilDave · « **Reply #69 on:** January 09, 2016, 03:13:39 pm »

Time for a very swift kick......come on down and help out with Shuffling testing. please.
There's bounty on offer....!

Updated the OP:
https://nxtforum.org/news-and-announcements/shuffling-sunday-!-%28testing-nrs-1-7-2e-coinshuffle-13-12-2015-%29/

romanix · « **Reply #70 on:** January 09, 2016, 07:39:37 pm »

Hi all,

I'm willing to participate but I can't access my old TESTNET test account anymore. Invalid passphrase ... despite password manager?!

Can somebody send the needed NXT TESTNET amount for shuffling test to this address?

NXT-PNUD-ZYSK-6ZJJ-4UWV8

Thanks,

EvilDave · « **Reply #71 on:** January 10, 2016, 10:31:12 am »

Shuffling Sunday II: Sabotage !

I'm just in the process of booting up a 1.7.4 TestNet node, so I'll throw some TestNXT in Romanix' direction in a few minutes.
In theory, let's kick off with shuffling from 12.00 UTC onwards, and we keep our TestNet nodes up for at least 24 hours, give people enough time to carry out attacks on the CoinShuffle systems.

Lets get shuffling, and see if we can break it....

PoofKnuckle · « **Reply #72 on:** January 10, 2016, 10:47:04 am »

EvilDave · « **Reply #73 on:** January 10, 2016, 10:52:43 am »

And, just to remind you lot: during the last Shuffling Sunday, we created both an MS Currency and an Asset to use in shuffles:

Th above is the EDshuffle asset.
(Asset ID is: 6110157953759788262)
It's cheap, just buy some as needed.

And that is the SHUFF MS currency.

EvilDave · « **Reply #74 on:** January 10, 2016, 11:00:26 am »

Quote from: romanix on January 09, 2016, 07:39:37 pm

Hi all,

I'm willing to participate but I can't access my old TESTNET test account anymore. Invalid passphrase ... despite password manager?!

Can somebody send the needed NXT TESTNET amount for shuffling test to this address?

NXT-PNUD-ZYSK-6ZJJ-4UWV8

Thanks,

Sent 10,000 TestNXT.....anyone else needs some TestNXT, ask here:
https://nxtforum.org/testnet/some-testnxt-to-test-asset-exchange/

mystcoin · « **Reply #75 on:** January 10, 2016, 12:42:37 pm »

I participated in the EDShuffle asset shuffle. It was successful, but I was surprised to receive 7 NXT in addition to 1000 EDShuffle in the new account.

romanix · « **Reply #76 on:** January 10, 2016, 12:55:40 pm »

feedback regarding coin shuffling:

IMHO coin shuffling is the only NXT GUI feature that I don't get without reading some docs or wiki.
Where can I find a short description of who it works? Or are users supposed to read the paper "CoinShuffle: Practical Decentralized Coin Mixing for Bitcoin"?

Who is receipient? Myself or who else?

Do normal NXT payments go through a shuffler? If not, how to direct a payment through a shuffler?

Do I create a shuffler before I want to do a private (untraceable) transaction .... or just to earn some fees or both?

Are NXT and assets locked up in the shuffler?

Riker · « **Reply #77 on:** January 10, 2016, 01:04:43 pm »

Quote from: mystcoin on January 10, 2016, 12:42:37 pm

I participated in the EDShuffle asset shuffle. It was successful, but I was surprised to receive 7 NXT in addition to 1000 EDShuffle in the new account.

We send you these NXT otherwise you won't be able to use your newly created account without funding it with NXT first which would compromise privacy.
On mainnet this would be 1000 NXT instead of 7.

Riker · « **Reply #78 on:** January 10, 2016, 01:14:37 pm »

Official documentation https://bitbucket.org/JeanLucPicard/nxt/issues/325/coin-shuffling

romanix · « **Reply #79 on:** January 10, 2016, 01:29:05 pm »

Quote from: Riker on January 10, 2016, 01:14:37 pm

Official documentation https://bitbucket.org/JeanLucPicard/nxt/issues/325/coin-shuffling

Thank you Riker, that helps understanding it a bit better.

News:

Author Topic: Shuffling Sunday ! (testing NRS 1.7.4 CoinShuffle, 10+17-01-2016 ) (Read 24527 times)