9

Are there any others that are particularly effective? Yes, if you know what wallet was used and if its transactions have distinguishing features. For example, multisig wallets usually use p2sh change, but the recipient rarely uses p2sh, which allows to determine the correct change output with high probability. Data-Driven De-Anonymization in Bitcoin ...


6

If an entity runs a large amount of relay nodes on the network, they could figure out which of their nodes was the first to see a transaction, and which peer that transaction came from. That does not necessarily tell them the originating IP, as it could have been a a node relaying a transaction rather than sending one. This leaves a large amount of ...


6

I believe you are undoubtedly the victim of a scam. It is extremely unlikely you will be able to trace the money to any identifiable individual. Bitcoin is designed to make this very difficult. I suggest you firstly report to police that you are the victim of a fraud, secondly accept that the money is irretrievably lost and move on with your life. You ...


5

I have a couple of friendswho want to purchase bitcoin, I would buy the bitcoins for everyone, that is why I have all of their card and personal info. I wanted to use a single wallet (mine) and then transfer the funds to each of my friends preferred wallets Can I personally be traced? First off, service recommendations are off-topic on this site, for more ...


4

The paragraph you copied from the Bitcoin wiki is imprecise. Transactions result in transaction outputs that usually are associated with specific addresses. I.e. there is a balance of bitcoins associated with an address, that only can be spent by an order signed with the address' corresponding private key. The bitcoins itself are not identifiable, rather ...


4

tl;dr You should use rounded values of ZEC when unshielding, and even then you will have less privacy than if you only use z-addrs. We address this exact question in this blog post (images from which I reproduce below). Transactions using the Bitcoin-inherited t-addresses are obviously traceable. However, the zero-knowledge property associated with the use ...


4

That would depend on the owner/operator of the ATM, and your relationship with them. Normally, you will need to register with a Bitcoin ATM company in order to use their machines. This is so that the company can comply with local laws and regulations, just like exchanges need to comply. Effectively, Bitcoin ATMs are not "automatic teller machines", but ...


4

No, there isn't. Bitcoin has no central management of anything at all. Public keys are pseudonymous and in general it may not be possible to identify the user to whom a public key belongs. A private key is kept by the user who generated it, and typically is never revealed to anybody else.


4

I think I have an answer. It's not clear if this is how blockchain.info does it, but I'm not sure it matters, either. Taint is very similar to the everyday experience of diluting a liquid. Imagine starting with three glasses. One glass contains orange juice. The second contains water. The third is empty. Pouring some or all of the orange juice into the ...


4

No, that's completely wrong. There is absolutely no anonymity benefit to third-party transaction malleability. Third-party transaction malleability makes use of a symmetry in ECDSA signatures that allows changing a transaction's id to exactly one alternative id. The alternative signature has been deprecated and non-standard for years, but miners could still ...


4

I find that claim (tracing the IP address of a transaction) highly suspect as transactions don't have an IP address associated with them. Once a transaction has been broadcast, it is incredibly difficult to figure out what IP address first sent the address. To do so requires that you have a connection to every single node and wallet and determine the IP ...


3

The tool for complete history of all bitcoin minted already exist and its called blockchain. You can see all history here (random transaction selected) https://blockchain.info/tx/ff698f3e5321448d4d889fcd3c91f9e5f5767542d2f0fd7e4aa41a83abec3ab7 There is a term taint and it's meaning how two addresses are connected. It partially explained here What are ...


3

Nope, don't worry. The nodes you have connected only know that your IP address has downloaded the blockchain, but the transactions you'll make in the future won't contain information specific about it. The main threat to your privacy are contact points between the blockchain and real life (when you make a purchase and pay with Bitcoin, when you buy at an ...


3

Yes, this is possible. Although most consumer wallets will probably not do that, they're simply meant to scan one QR code, send some coins to that address and return the remainder to a change address you own yourself. I'm fairly sure the Bitcoin-qt GUI wallet can create transactions to multiple destinations. Command line certainly can do everything. ...


3

There is no way to prove in the protocol that two address belong in the same wallet when you send from address A to address B in your wallet. Of course, if you are using some kind of online wallet they do know, but I'm assuming you are using a full one. However, there can be clues that combined can be quite definitive. 1. Clues when you send the ...


3

Using a mixer helps preserve your financial privacy. The question is: who are you protecting your privacy from? Bitcoin transactions are public record, so anybody can view any historical transaction at their leisure. So when considering your privacy, there are a few different situations worth exploring, for example: An unrelated third party is looking at ...


2

The Bitcoin blockchain does not have any concept of location, nor could such a thing be added to it. There is no such thing as "tracing a transaction" in a corporeal sense. If you had a comprehensive global surveillance network, you could attempt to connect to every Bitcoin node in the network (including all the nodes located in Tor) and use timing ...


2

To find all the accounts that hold an asset, e.g. USD/gw1, you just need to use the account_lines API on the gw1 account and filter out the USD entries (or whatever currency code you are interested in). Although you could recursively look up the account lines of each found account in turn, that doesn't tell you anything more about who "holds the IOUs from a ...


2

Actually, yes, this is possible. However, your payment output might get split or combined with other payment outputs in later payments. Therefore, the graph will be less linear than you suggest: C ↴ ↱ H A → B → D → E → G ↳ F So, A would be sent to B, then B + C would produce D, D would be split up to E and F, E would further be split ...


2

Even if you use a mixing service it is not guaranteed that the link between the two+ addresses will disappear. Actually, as far as I know it cannot be guaranteed by any mixing service, decentralized or not, including extra fees or not... In theory, a good mixing scenario would use a purely decentralized service with a consistently huge amount of ...


2

I think you're looking for a "mixing" service (I've also heard it called "tumbling"). The idea is you mix your coins with those belonging to others, and send the output to new addresses in new configurations. This makes the "taint" (percentage of coins traceable back to a single address) pretty murky. Take a look at Mixing Services on bitcoin.it. These ...


2

First off, I'm glad you didn't send money as that often does not help in these situations. As for tracking the attacker through their bitcoin address, I'm sorry to say but most likely that is not possible. It's impossible to determine the location of a bitcoin address without some sort of identification tied in. They also most likely would tumble the ...


2

The difficulty with such a scheme would be identifying the customer. Certainly, the loyalty program operator can monitor incoming transactions to addresses registered by participating merchants. But the public blockchain shows only the address from which the payment was made. The question is how to use that address to identify the customer who should be ...


2

No, an email address cannot be obtained from a Bitcoin address. Addresses can be generated on an offline PC by someone living in a desert who doesn't even have an email address. Most wallets won't ask you to provide any personal information, they won't even ask you which country you live in, let alone contact information like an email address. Such personal ...


2

Bitcoins can be exchanged to dollars in questionable exchanges like BTC-E or LocalBitcoin. These exchanges are not interested in the source of Bitcoin, do not co-operate with authors (police) and thus scammers are able to do cash out stolen Bitcoins. You can only see the Bitcoins go into the exchange, but the exchange won't give you, or the authors, the ...


2

Knowledge about his addresses and transaction history will be sufficient to discover addresses with which he made deals. His Private key will not help. This is the consequence of public ledger. The different case is with deterministic wallets. When you know master private key/ mnemonic seed you can check all derived addresses, even the ones you have no ...


2

The same kind of business trust and legal things that let an exchange or a bank running I suppose. There have been exchanges doing what you said in the past, and they have gotten the same legal pursuit as any other business scamming his clients. Here is some links: https://www.coindesk.com/six-arrested-over-cloned-crypto-exchange-that-stole-e24-million ...


1

I'm not sure of the existence of a directory of experts by physical location since Bitcoin is a digital currency. Elliptic is a blockchain intelligence company identifying illicit activity on the Bitcoin blockchain and providing services to leading Bitcoin companies and law enforcement agencies globally. Their HQ is in London and main office in New York. ...


1

WalletExplorer.com can associate addresses and Txs with ~100 services, including: LocalBitcoins Silk Road, Agora, other DNMs Defunct services like Vaultofsatoshi, Bitcoinica, Inputs.io, Mt. Gox etc Strongcoin, other wallet providers Lending platforms like BTCJam BTC-E, Coinbase, Bitstamp and other popular exchanges Gambling sites like Just-Dice, ...


1

Bitcoin addresses are pseudonymous, in other words they aren't linked to anybody's ID without that user somehow linking the address to their ID (for example by withdrawing from an exchange service where they have provided their ID to the exchange). There are various known tricks/tools to reveal IP addresses of transactions and to link various addresses to ...


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