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881  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN] Zcoin (XZC) - Implementing Zerocoin technology for financial privacy on: January 11, 2017, 01:54:52 AM
What is the average H/S people are seeing with an Intel quad? (2xxx, 3xxxx, 4xxx, 6xxx)

RAM speed is also important here Cheesy
882  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN] Zcoin (XZC) - Implementing Zerocoin technology for financial privacy on: January 11, 2017, 01:54:34 AM
Our official guide for mining on a pool:

https://github.com/zcoinofficial/zcoin/wiki/Pool-Mining-Guide
which has a Windows binary.

If you want to use Google Cloud or similar:

https://github.com/zcoinofficial/zcoin/wiki/Zcoin-cloud-mining-guide-for-newbies---Part-1:-Google-Cloud

This will allow you to mine on a cloud.

There is no GPU miner for this current algo but we are looking into changing the parameters to allow GPU mining while waiting for MTP. For further details, read our blog post!

http://zcoin.finance/language/en/poll-on-proposed-parameter-change-on-lyra2-algo-to-enable-gpu-mining/
883  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN] Zcoin (XZC) - Implementing Zerocoin technology for financial privacy on: January 10, 2017, 10:35:27 AM
On the Bitcoin.com website, he has already stated it pretty clearly

https://news.bitcoin.com/zero-knowledge-zcoin-launching-soon/

See what is written there:

Quote
Disclaimer: Bitcoin.com owner Roger Ver is invested in ZCoin.

He's also made a Zcoin subforum in Bitcoin.com and has mentioned us numerous times in interviews and Reddit posts.

https://twitter.com/zcoinofficial/status/817218278913228801
https://www.reddit.com/user/MemoryDealers/?count=75&after=t1_dbl1qu3

However as a new project, we feel we want to do some housekeeping with our coin and get it in a good state before Roger helps us out further for the best effect which we feel this is the responsible thing to do.

884  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN] Zcoin (XZC) - Implementing Zerocoin technology for financial privacy on: January 09, 2017, 03:16:42 AM
Looks like an antivirus removed all last posts of "username_007" here...  Roll Eyes

I personally only deleted one. He did the rest or a mod...

But yeah it appears he was an alt account for Castellum that was a Zcoin clone (which is also now deleted). Exists in Google search results though.
885  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN] Zcoin (XZC) - Implementing Zerocoin technology for financial privacy on: January 08, 2017, 04:33:17 PM
Remember the first load after upgrade will still be slow Smiley
886  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN] Zcoin (XZC) - Implementing Zerocoin technology for financial privacy on: January 08, 2017, 01:51:29 PM
Check out our new splash screen Cheesy

887  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN] Zcoin (XZC) - Implementing Zerocoin technology for financial privacy on: January 08, 2017, 12:41:51 PM
We are pleased to release v0.1.8 of Zcoin which fixes the following issues:

  • Wallet loading times improved greatly. First loading time after install/reinstall will still take hours but subsequent loads will take minutes.
  • Fixed compile issue for MacOS

Please head to our Releases page to download the updated binaries which are available for Windows and Mac. Linux binary will be released later today. If you wish to compile your own binary, you can do so from the Github.

The reason why the initial load still takes such a long time is due to a full verification to ensure there are no Zerocoin double-spends.
888  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN] Zcoin (XZC) - Implementing Zerocoin technology for financial privacy on: January 08, 2017, 08:43:14 AM
Thanks have updated it Cheesy

Please don't confuse the old inactive Slack (zcoin.slack.com) with our current one at https://zcoinofficial.slack.com.
889  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN] Zcoin (XZC) - Implementing Zerocoin technology for financial privacy on: January 08, 2017, 04:10:39 AM
There have been concerns on hashrate being dominated by CPU only which allows people who use/purchase discounted credits (not always legally) to run large cloud mining operations via AWS and similar.

This is against the spirit of having egalitarian computing which is one of the things that MTP was meant to address. As we only expect MTP development completion in March, the devs are considering doing a parameter change to the Lyra2 algorithm which would allow GPU mining to work alongside CPU mining as a temporary measure to address dumping of coins and unfair domination of hashrate.

We are holding a NON BINDING poll to gauge community sentiment that will be one of the factors we shall consider in our decision. We appreciate your feedback. The poll will be conducted in our Slack zcoinofficial.slack.com in a separate channel #poll. If you need an invite to the Slack, please proceed to our invite page. Please vote responsibly!
890  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN] Zcoin (XZC) - Implementing Zerocoin technology for financial privacy on: January 06, 2017, 05:51:12 AM
we are actually finding some blocks on maxminers.
but there is definitely room for a few more people to join in.
that would be good.
who wants to defect?  Wink

Not defecting, but I am splitting up some of my hash power to make sure all the pools get a fair shake and secure the network.


Its been 32 hours + since the last block so lets hope a few others decide to split up the hash power they have.

Fingers crossed

Thanks! Greatly appreciated Cheesy
891  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN] Zcoin (XZC) - Implementing Zerocoin technology for financial privacy on: January 06, 2017, 05:50:37 AM
I though Poramin had already upgraded wallet so that it doesn't lag and so that it syncs faster, it seems like this coin needs a Dev team behind it, because poramin on his own it makes it a little difficult for him.

I have downloaded the poramin version but it's so lag and now it's over 24 hour and I see that it was stucked at block 13189 (12 days to go).
How can I do it? how long must I wait for synchronizing?

Where is your location and have you opened up port 8168?
892  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN] Zcoin (XZC) - Implementing Zerocoin technology for financial privacy on: January 06, 2017, 05:50:02 AM
I though Poramin had already upgraded wallet so that it doesn't lag and so that it syncs faster, it seems like this coin needs a Dev team behind it, because poramin on his own it makes it a little difficult for him.

I guess besides him there's a team? If only one person this will become tough. I do hope this coin willl continue despite recent turmoil, as at least it has some good features and plan for more good features.

Yes it's pushed to dev branch and we are testing but not released yet. We have only been testing it a week and we should get a new release within a week or so. This will have the faster loading time. As mentioned the first loading time will be slow but subsequent loads will be in minutes.

We recently had an additional developer to help us out so Poramin is not alone. Cheesy We hope to recruit more.
893  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN] Zcoin (XZC) - Implementing Zerocoin technology for financial privacy on: January 04, 2017, 03:06:19 PM
Zcoin-qtv0.1.6.exe wallet windows for open 6 hour , and sometimes crash full system windows 10 , any good new version at horizon ? .

I have downloaded this version and it has run well on windows 8 but it took me about 12 hours to finish sychronizing.
You should shutdown it and restart the wallet again. Let it run and do not touch the wallet, after 12 hours it's ok.

Zcoin-qtv0.1.6.exe wallet windows for open 6 hour , and sometimes crash full system windows 10 , any good new version at horizon ? .

I have downloaded this version and it has run well on windows 8 but it took me about 12 hours to finish sychronizing.
You should shutdown it and restart the wallet again. Let it run and do not touch the wallet, after 12 hours it's ok.

The new version which we will release soon will resolve the wallet loading issues. It's currently being tested on the dev branch. The first load will still be slow but after that, subsequent loads will be in minutes Cheesy Thanks for your patience and we'll update it once we update it to the master.
894  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN] Zcoin (XZC) - Implementing Zerocoin technology for financial privacy on: January 04, 2017, 03:04:45 PM
Look at this Novaexchange scammers.
https://novaexchange.com/market/BTC_XZC/
Sell XZC at 0.00188 and tell about split...
Wallet maintenance and bla-bla...
-----------------------------------------------------
We first found information about that both developers for XZC have gone their separate ways, and should split the chain with same cointicker, when we saw that, we putted XZC in maintenance to be safe, because there was no date for this written in the information we found.

After that we got information from one of the developers about an upcoming hardfork and mandatory wallet update, and got a date, we updated and re-enabled XZC for some days more until New Years Eve, when the block for the hardfork was planned to be reached, after that we putted XZC in maintenance mode again and got after that information from the other developer about an upcoming hardfork and mandatory XZC wallet update.

We have responded to XZC devs that we want some more information about this chain-split, but haven't got any answers yet.

We in Novaexchange Admin Crew will take a talk with each other how to solve this and continue follow the developement of XZC, and our target is to enable XZC again as soon as possible, when we are sure on what's happening with XZC, and be sure that transactions will work correctly and not causing a lot of support cases and lost transactions depending on multiple chains running with same ticker

That's interesting because I did write in to contact them via their e-mail but didn't receive a response from them. I'll try to find an alternate way to contact them again. Thanks!
895  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN] Zcoin (XZC) - Implementing Zerocoin technology for financial privacy on: January 04, 2017, 03:45:55 AM
Any windows miner compiled?

Link in the guide Cheesy https://github.com/zcoinofficial/zcoin/wiki/Pool-Mining-Guide
896  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN] Zcoin (XZC) - Implementing Zerocoin technology for financial privacy on: January 03, 2017, 08:02:43 AM
Yes if all goes well we should see something in March. Fingers crossed.
897  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN] Zcoin (XZC) - Implementing Zerocoin technology for financial privacy on: January 03, 2017, 06:44:18 AM
can this new algo be mined effectively with gpu or it's like the old one that only cpu work and it is not worth to use gpu? i hope the dev understand that runnign a bot fest coin will never do anything good to the project, mining is very centralized now in this coin

The new algo MTP is expected to be kinda like Equihash whereby GPUs can also mine it but it won't be dominated by GPUs only and CPUs can still play a role.
It's still in development though and we're about 70% done.

I have recently got into this coin, the wallet takes 5.25 hrs to load, that's after three days to sync.  then i go to mine with it and get run time error's and the wallet crash's. is there any way to make it load faster and actually solo mine? or is there at least a windows miner that i can use for AMD cpu or gpu? i have no clue how to compile and ubuntu will not dual boot with my computer so i am stuck on win 7 x64. I do not get why i have issues with this coin. i have a x6 cpu 8gb ram and rx 480 with a 850w psu. i love mining and i am willing to learn more if i can find the help.

Hey TheFryer, the slow wallet load issue is known and a fix is actually already being tested. From our testing right now it looks very positive. The first load still takes several hours for re-verification but subsequent loads are in minutes. We'll also look at getting a bootstrap up for those who don't want to download the whole chain manually.

For solo mining, may not be that good now and GPU mining is not possible with this algo at this point in time but as this algo is only a stop gap until our new MTP mining algorithm is implemented. Best to try with a pool using this guide which also has links to binaries for Windows: https://github.com/zcoinofficial/zcoin/wiki/Pool-Mining-Guide

Just setup a ZCoin mining pool. If there are problems, let me know.
https://gflare.io/coin/zcoin


pool you use Who version of the wallet , Poramin or Gary?

He is on Poramin's version. The only version that matters right now. But he's still working on some issue with his pool.


Can Founders secretly mint Zerocoins?

No, they (and not including the dev) do not have access to the initial parameters and are subject to the same rules as everyone else.

Did you mean "not excluding the dev"?..  Wink

How do we detect a breach in Zcoin's initial parameters or a vulnerability?

In the event of Zcoin's initial parameters being compromised or some other vulnerability is discovered, Zerocoins can be minted. However this is easily detected as total supply is still auditable.
Total supply of coins that should exist = (block number x block reward)
OP_ZEROCOINMINT function shows all mints + 0.1 mint fee
OP_ZEROCOINSPEND shows all spends of Zerocoin
So you know exactly how many Zerocoins have entered the Zerocoin pool and how many Zerocoins have exited the Zerocoin pool.
total supply >= all circular money - (#zerocoin_mint_tx + 0.1 for each tx) + #zerocoin_spend_tx

Remember an example of a bug that can cause things going haywire has been observed in Bitcoin (https://en.bitcoin.it/wiki/Value_overflow_incident) but it was detected and fixed because the total supply was auditable.

This is not possible with Zcash as transaction amounts are obscured making it impossible to determine so if a flaw is found, this is a much bigger risk. This is the trade off for their added anonymity and we feel it's a risky one although they have attempted to mitigate this by multiple costly security audits.

I have a question here:
ok, lets assume we have detected that something is arong with total supply, so someone is minting "counterfeith" zerocoins... So what next? What can be done to save the coin in such case? Can anything be done, or as soon as it happens, the coin is doomed together with the investment people have made into it?


Yes what I meant was the dev doesn't know the initial parameters either Cheesy double negative oops Tongue.

It is noted that knowing the initial parameters does not break the anonymity of transactions, just that it allows the counterfeiting of Zerocoins which isn't really in the RSA accumulator. And as previously mentioned, when the supply doesn't check out, this will be detected.

In such a serious scenario, all Zerocoin spend transactions will probably need to be frozen while we identify the issue (if it's a bug which is the better problem) or whether someone truly knows p and q (which is a worse problem) though we think the latter scenario is highly unlikely. It is in our roadmap to replace these parameters eventually anyway with a non trusted setup which should resolve any remaining concerns but as I understand it, anonymity is preserved in either case.

It's also worth noting that some people have criticized the use of RSA primes. If RSA breaks, a whole lot more things are going to be broken (web browsers, chat applications, email, VPNs, SSL certs) and most likely Zcoin would be the least of your concerns as illustrated in this interesting side read: https://petertodd.org/2016/cypherpunk-desert-bus-zcash-trusted-setup-ceremony#zk-snarks





898  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN] Zcoin (XZC) - Implementing Zerocoin technology for financial privacy on: December 31, 2016, 04:29:34 PM
" Zerocoin's 'trusted setup' is purely two distinct large prime numbers which is normally referred to as p and q. Multiply them together and you get the parameter n which is used for the RSA accumulator setup. p and q needs to be destroyed."

Did you use the "old" params or created new ones?
More info..

n was taken from the factoring challenge as detailed in the article linked above. No new creation needed. We don't know what is p and q that was used to derive n.

Hey guys !

Here is a new pool:

https://xzc.maxminers.net

We yet have to find our first block, testnet was working, so it should working fine on mainnet as well.



Thanks! Will announce it on all our channels Smiley


Everything about Gary is true. He is a jerk who ran a bounty campaign but took such a long time to approve my bounty. I get my bounty immediately after I talk with Poramin. This Gary guy is just pretending to part of the team but not really show real contribution. I'm more than happy to see Gary out of this project but still worry about the development fund.

Thanks for helping out and sorry to hear about your experience. We will honor bounties a lot faster now. The dev fund from Tim's funding is more than enough to cover Poramins coding for a year and to fund additional devs to help him. This doesn't even include any of the founders reward or the bounty fund so we are in good hands.
899  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN] Zcoin (XZC) - Implementing Zerocoin technology for financial privacy on: December 31, 2016, 06:10:35 AM
The founder wallet address that was dumped and was removed was Gary's.
https://chainz.cryptoid.info/xzc/address.dws?aLrg41sXbXZc5MyEj7dts8upZKSAtJmRDR.htm

The other wallets in the Founder's Reward are more or less intact and that can be verified on your own. What is important is that the initial investors and dev are not dumping their entire stashes and are vested in the long term growth of the coin. We have already disclosed that these wallets belong to initial private investors and Poramin and a bounty fund.

The other wallet address that had quite a lot of deductions is the bounty fund which were used to pay various bounties which include (but not an exhaustive list) dev help (various people), community manager pay (Reuben), Glitch (website and logo design), ocminer (for pool code), blockchain explorer (chainz), coinpayments listing, our introductory video work and voice actress, various people for contributions on social media and maintaining other language communities, initial Zcoin giveaways for promotion and translation work.

Poramin's founder's wallet address which I am at liberty to disclose is: a1kCCGddf5pMXSipLVD9hBG2MGGVNaJ15U

With a bit of deduction, you can probably tell whose wallet is whose but we won't be making any official announcements on this at this time as we have not received clearance from the investors. What's important is that they are largely intact.

You can view the relevant history of Github here: https://github.com/zcoinofficial/zcoin/commit/6ad9bdf2ea1a01df2ce757eb842fb278f0f6582d?diff=split

The investors are Roger Ver, Tim Lee and one other investor who wishes to remain anonymous. Roger Ver and the anonymous investor were the initial investors together with some money from Startup Chile. Tim Lee is the new investor who is bringing in new investment (since the initial investment was largely taken by Gary) and also bringing the support of his team which we will see over the coming months.

As to why Founder's wallets are not 'anonymous' and how to prevent Founders from secretly 'minting' their own Zerocoins there's a lot of misunderstanding here and hope this clears it up. It is however ironic that when we do disclose further info on the founder's wallets we are then criticized for not being 'anonymous'. Tongue

How Zcoin and its Zerocoin implementation works for anonymity and how it affects Founders

Zcoin is anonymous by choice. This is a similar setup as Zcash and Dash. You can either choose to send coins like normal like Bitcoin or to anonymize your coins.
The anonymity in Zcoin works by burning up existing coins (minting Zerocoins) and then generating new coins (Zerocoin spend) with no transaction history. The zero knowledge proof ensures that you need not show people which coin you burnt but can prove that you burnt it that allows you to redeem. So you will get new coins on a new address with no transaction history.
Founder's wallets are built into the block reward and are directly given to them from the block reward. These are done in normal Coinbase transactions.
Founders can of course choose to mint their block rewards which will anonymize them and make it unclear which coins they still keep and which coins they have spent. But they have for the most part not done this (with the exception of Gary). If their founder's wallet is untouched, it is untouched. If it has deducted an amount, they have either been transferred out or minted Zerocoins. Once they have minted Zerocoins, they could be still kept by them or they could have spent it elsewhere but you can not tell which. This is where the anonymity comes in but I suspect if they do this, more FUD will come about.

Can Founders secretly mint Zerocoins?

No, they (and not including the dev) do not have access to the initial parameters and are subject to the same rules as everyone else.

Zcoin uses Zerocoin. Zerocoin's 'trusted setup' is purely two distinct large prime numbers which is normally referred to as p and q. Multiply them together and you get the parameter n which is used for the RSA accumulator setup. p and q needs to be destroyed. This is why we use parameters that were generated for a cryptographic challenge created in March 1991 which we believe is unlikely to be compromised. For further reading on how these parameters came about and the cryptographic challenge, you can view this article.

Zcash's setup on the other hand is much more complex and is >1 GB in length and their trusted setup and how they did it is a lot more complicated and there have been criticisms of it.

Of course having a trusted setup in general is not ideal and we are exploring ways to do away with this trusted setup entirely (as stated in our roadmap) but we believe our trusted setup is unlikely to have been compromised, and even if it was compromised, would be easily detected (see below). We note that there are some people who claim that they have done trustless setups for Zerocoin via RSA UFOs but this is impractical as it has huge performance hits. Another coin has claimed to find a way to modify this to make it usable but we believe this method is flawed as detailed here (https://twitter.com/secparam/status/449619152685522944) (Ian Miers is one of the original authors of Zerocoin and Zerocash).

Remember, neither the dev nor the founders have the trusted parameters as these were generated by a third party as elaborated in the article above so they aren't able to mint Zerocoins themselves. Even if they did, it will be detected as explained below.

How do we detect a breach in Zcoin's initial parameters or a vulnerability?

In the event of Zcoin's initial parameters being compromised or some other vulnerability is discovered, Zerocoins can be minted. However this is easily detected as total supply is still auditable.
Total supply of coins that should exist = (block number x block reward)
OP_ZEROCOINMINT function shows all mints + 0.1 mint fee
OP_ZEROCOINSPEND shows all spends of Zerocoin
So you know exactly how many Zerocoins have entered the Zerocoin pool and how many Zerocoins have exited the Zerocoin pool.
total supply >= all circular money - (#zerocoin_mint_tx + 0.1 for each tx) + #zerocoin_spend_tx

Remember an example of a bug that can cause things going haywire has been observed in Bitcoin (https://en.bitcoin.it/wiki/Value_overflow_incident) but it was detected and fixed because the total supply was auditable.

This is not possible with Zcash as transaction amounts are obscured making it impossible to determine so if a flaw is found, this is a much bigger risk. This is the trade off for their added anonymity and we feel it's a risky one although they have attempted to mitigate this by multiple costly security audits.

Why the Fork away from Gary?

Without getting into the dramatic details, this mainly arose from a few key factors:

a) lack of transparency to Poramin on how the initial investor funds were utilised and how much was left to fund Poramin's dev (with Poramin doing all the coding work). The vast majority of the initial investors' funds (>90%) remain with Gary so if anyone thinks he was forced out unfairly should consider this.
b) lack of involvement from Gary on his duties with very little disclosure to the team as to how he was working to promote Zcoin despite numerous pushes to help out.
c) the dumping of Gary's wallet and the lack of spending on Zcoin marketing/dev and building the team. This lead to many good people who wanted to work or contribute help to the coin to lose interest when they were not remunerated fairly for their efforts.
d) questionable behavior in a number of specific instances that did not tally with Gary's assertions. I will refrain from going into details. You can dig them by yourself from Slack and BCT.

Happy New Year everyone and stay safe!!!!
 
900  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN] Zcoin (XZC) - Implementing Zerocoin technology for financial privacy on: December 30, 2016, 10:12:42 AM
@jeremy grol:

It is FUD and is evidenced by the blocks progressing to the new block past 13999 already when the fix had nothing to do with those lines.

He's not asking, he's spreading misinformation that is purely untrue. You can look at the nature of his other posts.

I am Reuben, the official community manager of Zcoin as listed in zcoin.finance (http://zcoin.finance/language/en/about/) and elaborated many times in this thread. All the technical replies I have vetted with Poramin.

As for the bounties, the only founder wallet that was significantly dumped was Gary's which was emptied. One of the big reasons that lead to the split. Remember the founder's reward does not consist of only the bounty wallet but also the initial private investors and dev's wallets.

Poramin's wallet remains almost entirely intact except for some small amounts. Roger's wallet remains untouched and the other investor's wallet liquidated only a bit during initial launch. The bounty wallet was not dumped and was indeed used to pay bounties (including my pay). This can all be seen on the block explorer.

The blog post on the bounty wallet was done by Gary and not me. I am protecting investors by preventing the spread of inaccurate information all which is publicly verifiable and in the code and Github.

As for the Slack? The old one is moderated by Gary and he's the one that is absent. We were previously removed from the old Slack by Gary.

The new one Poramin is replying in and is pretty active:
http://invite.zcoin.finance:3000 to get an invite.
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