Bitcoin Forum

Hey guys

I've been watching this Forum almost 2 years now but never had anything to add, so never joined
Now I found this
Zerocoins: Bitcoin add-on makes your virtual purchases private

http://www.newscientist.com/blogs/onepercent/2013/03/bitcoin-zerocoin.html (http://www.newscientist.com/blogs/onepercent/2013/03/bitcoin-zerocoin.html)

sounds promising but I am a Mechanichal Engineer

Any CryptoGeeks can explain please ?

Hmm it's not explained technically in the article...


It sounds like you send your coins to some huge wallet, and you can also send instructions to the huge wallet to spend your credit.  I don't see how this could be done in a distributed fashion yet (not requiring a central server).  Perhaps it's some trick with incomplete transactions / oracles:

https://en.bitcoin.it/wiki/Contracts

probably we'll have to wait untill the paper is released in May
thanx for the link

Bitcoin don't need this

Everything is just fine the way it is

WE GOT ENOUGH BITCOINADDRESSES

try your magic trick in the circus ;D

There's nothing mysterious about how it works:

In other words, you leave your bitcoins somewhere in the network, to be picked up and used by some stranger using the addon. Then you use some other stranger's bitcoins.

What I don't like about zerocoin is:
I believe letting someone do searches on data meant to protect privacy is against protecting privacy.

was just going to add this, they are obviously just doing this as an academic thing then, because its pretty pointless to make a privacy system that can then be made not private.

-or maybe they want us all using this so they can track us more easily with there back door  ???

Privacy is built into BITCOIN!!

/END THREAD

More likely they want funding to develop the code, and then an open source clone without the backdoor would be devleoped and would be the actual system used, and the banksters get left with notihing of useful value for their "investments".  It's open source, dude, if there is a backdoor, it can be found in the code and either altered or exploited.  IT's not really going to happen in practice.

Forbes just released an article today.

http://www.forbes.com/sites/andygreenberg/2013/04/12/zerocoin-add-on-for-bitcoin-could-make-it-truly-anonymous-and-untraceable/

Here's the blog post,

http://blog.cryptographyengineering.com/2013/04/zerocoin-making-bitcoin-anonymous.html

Here's the whitepaper,

http://www.scribd.com/fullscreen/135520257?access_key=key-1l8m2jd8qssgw419i4ud

http://spar.isi.jhu.edu/~mgreen/ZerocoinOakland.pdf

IMO competition is good in currencies. Most people I talk to in the states don't even realize that there is other money besides dollars which always baffles me. Are we really that uneducated???!!!

Zerocoin isn't really an alt coin.  It'll be pegged to bitcoin.

Speak for yourself. I can generate addresses all day, it is not going to break the connection between the transactions.

How could a BitCoin exchange be traced? You put in the address, your number goes down, their wallet goes up...

Would someone just need to watch for bitcoin-type data being sent?

Looks like the public at large might be so soured on bitcoin that another name and improvement
like ZeroCoin might be a good idea to keep cryptocurrencies going...
but why ZERO? why not call it something more positive?

Added to the wiki (https://en.bitcoin.it/wiki/Zerocoin).

Also - Does the ZeroCoin protocol fulfill its promise of anonymity? (http://bitcoin.stackexchange.com/questions/9716/does-the-zerocoin-protocol-fulfill-its-promise-of-anonymity)

This deserves a scammer tag.

Might be a good idea to not add this to the BTC code anytime soon. Too much privacy might be counterproductive, at least with the government. To have it as a web thing makes some sense.

I guess people who want total anonymity will find a way to do that.

+1

blockchain.info

Also, the whole point of bitcoin is that everything can be traced.  This is the point of the blockchain.  Every coin is traced and you can trace back and eventually you'll get to a mined block.  This is how we prevent double spends.  Keeping track of all the outputs.  You can find out how many bitcoins are at each address.  You can trace where each input of that address came from.

Bitcoin is actually in a way less transparent than credit cards and cash.

Currently, to gain anonymity you would need to use a laundry service.  But you have to put your trust into the laundry service, that they don't run away with your coins or that they don't keep logs of who's coins go where.

with BTC people should have the freedom to have privacy.  And Bitcoin is currently less anonymous than credit cards.  Zerocoin might solve some of those problems.

Okay, I'm going check the wiki and stackexchange now.

EDIT: That didn't help at all.  Well, reading the paper and the blog post helped to explain it to me.

This is false.  Bitcoin is significantly more private than credit cards.  Credit cards, by their nature, are intimately connected to your real world identity.  It's literally impossible for them to be private from third parties.  With Bitcoin, even as it is, at least some degree of anonimity is possible regarding any person or organization that is not directly part of the transaction, although it often takes some degree of extra care.

Bitcoin is more private in that it is possible (arguably even simple) to conjure a pseudonymous identity that remains completely isolated from a human identity, with the caveat that such an identity must deal exclusively in BTC and digital goods, never sending or receiving real world goods (or their deeds) or fiat currency.

Bitcoin is less private in that once any goods or currency is exchanged at an interface, and a third party entity (could be a government, could be *anyone*) gains access to knowledge of that transaction, the identity of the *entire* networked history of that transaction is at risk of revelation.

This is why ZeroCoin is so critical.

Spoken like a newbie who thinks he has it all figured out.  ZeroCoin might have it's place, but it's far from critical.

Exactly. It's only critical to very few people, but those can continue using a mixing service as they do now. For the rest of us the negative side effects (extra computing power, extra bookkeeping) to the bitcoin network IMO by far outweigt the benefits (zero trust mixing service) in order the proposal to be accepted as it is proposed. But still, an interesting idea maybe something good will come out of it once it's scrutinized and polished by other clever people.

yay, I've used 'ignore' button for the first time ; )

While I'm sure that the realization (to those who never bothered to learn anything) that every Satoshi you ever spend will, by default, by traceable - and those networks of transactions can serve to identify and profile you - will scare some people, I'm believes that this transparency is important to Bitcoin's survival. For one, it will help to deter government regulation to some degree, as intelligence agencies have a wet dream about building tracing Bitcoins around the network. Two, it serves as a means to verify that taxes have been paid, and deter money laundering.

Zerocoin was wise to make it clear their design allows for a backdoor mechanism. That serves to allow anonymity (e.g. to hide how much you have), while allowing trace-ability by government agencies. It's superior to the Bitcoin mixing services, which are sure to be targeted sooner or later under money laundering laws.

OT: Reading the comments of many here, I am disturbed by the lack of understanding some have. If you're going to be enthusiastic about Bitcoin, you should at least learn its principles. It is not a panacea for all problems with currency and/or all problems in the world. It has many issues of its own, inherent to the design. It also has lots of positive attributes.

BTW, did anyone notice that the Zercoin anonymity extension was sponsored by (http://spar.isi.jhu.edu/~mgreen/ZerocoinOakland.pdf) the Office of Naval Research, DARPA, and the Air Force Research Laboratory  ?


Interesting ...

Interesting. The Navy was also responsible for Tor. Military has its fair share of uses for privacy.

Interesting, thanks for sharing

Interesting... a lot of people have been burned by some scrupulous laundry services. This will be really useful.

Do you have any examples of laundry services that burned their users? I am not surprised that there are some but was unable to find reports of such dishonest mixing services.


On another note, there's a presentation on Zerocoin at the Bitcoin 2013 conference this weekend, if anyone wants to go.

Zerocoin is where there is a pool of coins that are used to replace the original one without traceability to it.

E.G. At some point, if transferring 5.5 BTC to another person, then it could become a zerocoin. Somewhere, 5.5 BTC would come from another location (maybe 5 * 1 BTC and a 0.5 BTC value). The original 5.5 BTC transferred would go to a pool to be used in other transactions.

I'm using the wrong terminology and it has been a while since I read about zerocoin, but since it is a Newb forum, I don't mind posting this for someone to pick it apart.

I like the sounds of zerocoin but wonder if people will have as much faith in something that isn't traceable. Is it possible to code it to give less money out than in and people can't confirm?

If you implement zerocoin in bitcoin and a bug is uncovered, you will cause huge damage. Maybe it should be implemented in an alt coin first. Let it have more use than a test bitcoin network with less financial risk and less bitcoin exposure. Then port to bitcoin.

What is the latest with this coin?

Well, it's not really an alt-coin.  It's misnamed, really.  ZeroCoin is an adaptation of Bitcoin, like a highly dependent overlay network that establishes a p2p coin laundry/mixer; breaking the chain of custody that is inherent in the normal blockchain.

Every cryminal will be interested in bitcoin :D

So what? Every criminal I've ever known is very interested in US dollars, too.

BAAAAAMMM!
+1 More people need to repeat this to the sheeple...

Bitcoin is fine alone. Don't need it.

Of all the ideas that have come up, I like ZeroCoin better than most.  It can be built on top of the bitcoin network and that back doors "could" be built doesn't mean they will be. Back doors "could" be built into bitcoin proper, but it won't.

Thanks for your suggestion. I think bitcoin don't need any help.

It would certainly be nice to have a truly anonymous option