Questions tagged [privacy]

Questions regarding the information that is leaked through cryptocurrency transactions or related processes, when subject to analysis and attempts of identification of sources and other properties.

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2answers
117 views

Is it logical to use “Proof-of-Authority” for a “public” blockchain?

According parity.io website: Proof-of-Authority is a replacement for Proof-of-Work, which can be used for private chain setups. And also: The chain has to be signed off by the majority of ...
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1answer
53 views

What’s the point of wannacry for exchanging Bitcoins to Monero?

At first glance, exchanging Bitcoin for Monero makes sense. But why use Monero with an exchange, which is likely to help the police? (And which did.) Monero transactions are private only on the ...
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2answers
279 views

Is It Possible to Prove Ownership of Public Key Hash without Public Key?

I am building a system where I would like the user to specify a public key hash of a wallet that they have control over in the event of tips, refunds, and/or otherwise needing to send value back to ...
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1answer
111 views

Is Bitcoin anonymous? [duplicate]

Bitcoin transaction's anonymity depends on public-private keys. The digital tie between a public and a private key is stronger than the tie between a person and his DNA. If you committed a crime but ...
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1answer
77 views

Mobile Android Wallet for Dash that lets you do a private dash send transaction?

As of today 2018 June, is there an Android wallet that lets you do a dash private send? I know coinomi has Dash, but it doesn't have the privacy send features.
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69 views

Can malicious payer deanonymize payee in Zcash?

Looking at both the Zcash original paper and the updated Zcash protocol specification, it seems that after Alice paid Bob, she can reveal to the world that she did so. Alice can do so by revealing ...
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2answers
87 views

Understanding “anonymous transaction”

I have read In the original Satoshi whitepaper, it was recommended that Bitcoin users use a new address for each transaction to avoid the transactions being linked to a common owner. But in ...
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2answers
190 views

Can the wallet's balance be deduces from the wallet's address and the blockchain's history? Is this concealable?

Since all bitcoin transactions are public, I guess that all transactions could be summed up to get any wallet's balance. Thus sharing a wallet's address means sharing the whole wallet's data. Even ...
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1answer
912 views

How do we know which miner or pool mined a block?

There are websites that talk about each mining pool's total % of hashrate. I think they do that by calculating what % of the last X blocks were mined by a particular miner/pool. But how can we know ...
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4answers
57 views

Why blocks are validated instead of transactions?

In most of the conventional blockchains, blocks are validated instead of transactions. Why cant' transactions validated directly? The structure of basic blockchains are linked lists, by having DAGs, ...
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1answer
2k views

How can I use Bitcoin privately with the Electrum wallet and Tor?

I do not want to run a full node like Bitcoin Core but still want privacy running an SPV node like Electrum wallet to use Bitcoin. How can I setup to run Electrum privately with Tor?
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32 views

How can I confirm to whom the bitcoin address I sent a payment too?

Where can I find out what company is associated to the address I sent a payment too?
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31 views

State of privacy-preserving light clients

Currently, it is trivial to operate a SPV wallet in Bitcoin at the cost of a lot of privacy due to the necessity to connect to full nodes that offer SPV services. Neutrino, currently being worked on ...
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1answer
55 views

Is there a way to link a bitcoin user's transaction to entering a lightning network channel?

Since lightning channels are offchain. When you send bitcoins to a lightning network node or wallet. Is there a way for companies like chainalysis to see if your on the lightning network? And then ...
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0answers
21 views

What is considered to be sufficient anonymity set?

We know that 2 is insufficient and 10,000 is more than enough. We also know JoinMarket can achieve about 2-6, Monero 2-3, but there all transactions are mixed, so they add up, CoinJoin can do 400-...
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1answer
358 views

Mixing Unequal Inputs

Let's say have 3 inputs (alice, bob, satoshi): 0.3, 1.3, 1.6. We can mix these inputs for example like this: 0.3, 0.3, 0.3, 0.3, 0.3, 0.3, 0.3, 0.3, 0.3, 0.3, 0.1, 0.1. Or like this: 1.3, 1.3, 0.3, 0....
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2answers
117 views

Why does bitcoin not have something like nicknames?

It would be much easier to exchange bitcoins if everyone could have one or more unique nicknames on the blockchain. Of course what should not be possible is that other people can check the balance by ...
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2answers
78 views

What can be done in order to improve privacy in bitcoin transactions?

Privacy should be default and not an optional property - even when using stealth addresses or confidential transactions, your bitcoin balance and transactions in the wallet are transparent to anyone. ...
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2answers
156 views

What are main advantages of Bitcoin over Monero? [closed]

In the world of full spectrum surveillance, since some time it has become more than evident that Bitcoin isn’t that anonymous at all. All transactions can be traced on the blockchain. There is a ...
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1answer
413 views

What consensus algorithm is MimbleWimble/Grin using? Does it use Zero Knowledge Proofs as well?

Understand that MimbleWimble/Grin is privacy centric. Does it use Zero Knowledge Proofs to achieve the privacy goals? In addition, what consensus algorithm is MimbleWimble/Grin using?
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1answer
68 views

Share private data and prevent data forwarding

Let's say A has some private medical records of patients and B is a pharmaceutical company who wants to view medical records from A to find out the effect of a particular drug on the patients (run a ...
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1answer
80 views

How Bitcoin wallets avoid address re-usability?

As we know, address reusability compromises both privacy and security. My question is how Bitcoin wallets avoid address reusability? Is wallet generates an address from index 1 and scan blockchain ...
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2answers
58 views

Create a non-changeable bitcoin address?

How to get a non-changeable bitcoin address. I tried to register on few bitcoin wallets websites but on each website btc address is changed after one payment is received and I didn't find the option ...
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2answers
295 views

Bitcoin Core Wallet - Really Anonymous?

how does one remain truly anonymous on bitcoin network? Say, for example, if one use the bitcoin core as its wallet, while sending one's first transaction, will his/her IP be somehow revealed at that ...
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2answers
75 views

What are list of privacy coins available today? [closed]

Where can I get list of privacy coins which I can invest on? Is it a good option to invest on these coins?
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97 views

How does an anonymous cryptocurrency encode coin values

I'm pretty sure I understand how cryptographic accumulators work to anonymize a coin's history, for example as described here: https://anoncoin.net/Cryptographic_accumulator/ but I have read that ...
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0answers
48 views

What impact on privacy does it have when a service like Coinbase starts using batching?

In the recent discussion of Coinbase's sending outage, the question was brought up how the privacy of Coinbase's customers would be affected if Coinbase started to use payment batching instead of ...
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1answer
73 views

How can I protect my privacy?

Let's say I want to send BTC to a friend. This friend can now explore the blockchain and find how much money I have or what other purchase I've done or will do. What can I do in order to prevent him ...
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1answer
89 views

Can one trace a criminal with his Pubkey?

Say FBI arrested a guy who bought some drugs using bitcoin. Then, is it possible for FBI to trace a drug dealer using the arrested guy’s PrivateKey and his transaction histories? If my understanding ...
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2answers
120 views

What information is available from the blockchains of privacy currencies?

Some currencies such as Monero and Zcash focus on protecting user privacy as much as possible. What information is available from the blockchains of these currencies? Number of wallets? Transaction ...
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1answer
54 views

Bitcoin Mixing? Is it even real?

I have been trying to find a "bitcoin mixing" service but it seems that ALL the "bitcoin mixing" sites I have looked at are scam. Does anybody know of any that are actually real and do what they say ...
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1answer
32 views

I have read many times that bitcoin is a public blockchain. Why is that?

Is there some special reason that Satoshi made bitcoin like this. Wouldn't in a private blockchain, transfer of currency would be more secure? Also, is it possible to create a separate blockchain to ...
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2answers
2k views

Is my account balance publicly visible?

If I'm sending someone my wallet address, am I making my account balance visible to him? As far as I understand, all transactions are public, which means that if I know an address, I can reconstruct ...
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2answers
3k views

Finding IP addresses of all bitcoin miners

I understand that the transactions don't have any IP info in them but I am curious to know if it is possible to enumerate over list of all the IP addresses involved in mining?
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1answer
180 views

Does 'Mixing' in bitcoins really add up protection to my bitcoins?

I was researching on simple ways to protect bitcoins without using unknown/untrusted software or solutions. It took my attention to 'Mixing' in the bitcoins with a friend's bitcoins and transfer back ...
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1answer
82 views

Can a Bitcoin wallet be identified as belonging to an exchange?

Ethereum wallets can be associated with Exchanges (e.g. Etherscan.io will tell you if an address is a Poloniex one). Is this possible for Bitcoin addresses?
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1answer
199 views

If the public key characterize the wallet, is it possible to track all transactions of that wallet?

To explain better my question, consider this example: Individual A is an investigator Individual B is been investigated Faking to be interested B's service, individual A gets B's public key to pay ...
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2answers
129 views

Eliminating all private keys records from pc

Suppose I buy a new wifi router and a new pc. I set up both the wifi network (of course, with a password) and the pc. Now I access the internet for a few seconds in order to download bitaddress.org ...
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3answers
1k views

Is Bitcoin trading anonymous and untraceable?

I know little about bitcoin except they are digital currency. I heard that bitcoin ownership or exchanges/trading is anonymous and untraceable by government. Is that true? If I buy a bitcoin and pay ...
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0answers
424 views

Safely generating Bitcoin paper wallets [closed]

I'm new to Bitcoin and I have recently purchased a few fractions of Bitcoin. My BTC are stored on what I understand is an online wallet (a website where I log in using two-factor authentication and ...
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1answer
472 views

Tracking the wallet owner of stolen bitcoins [duplicate]

Hello Recently my bitcoin wallet was hacked and the money was transferred out into another bitcoin wallet. Is it possible to track and find out the owner of this wallet
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2answers
239 views

Security implications of regular saving into cold storage

I am thinking about following this plan: Regularly buy bitcoins in an online exchange, 100€/month at market prices. Once the balance in the exchange exceeds a certain limit (500€), move those ...
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1answer
97 views

How to distribute UTXOs in hard fork while preserving privacy?

Let us say I have a UTXO set S = {U1,U2, U3 ..., Uk} on a pre-fork bitcoin blockchain. How do I spend the previous UTXO S so that the new UTXO sets on both the chains are not linkable/tracable? Are ...
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1answer
109 views

Is it possible to determine BIP39 keys are related

Is it possible to determine if public or private keys generated with a single same BIP39 phrase are related to one another?
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1answer
949 views

What is taint analysis?

I just came across the term "taint analysis" in a crypto-related conversation. This came up while discussing "tracking bitcoin transactions" so it's somehow related to that. That's all I know.
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1answer
61 views

Is there a way I can get my own independent vanilla p2p cli wallet?

To elaborate, I want a wallet that's independent of any third party intervention unlike coinbase wallets being dependent on the company. If there is the way how much privacy can be maintained? And ...
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1answer
152 views

How do you track the participants of a multisignature transaction?

How to glean which wallets were involved in a multisignature transaction?
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1answer
115 views

How to prove bitcoin ownership without revealing amount?

Is it possible to use some cryptographic scheme to prove bitcoin ownership without revealing any information about value held in addresses?
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1answer
472 views

Anatomy of mixing transactions

I've read some literature on mixing in systems like TOR and also in Bitcoin. In Bitcoin and Cryptocurrency Technologies, the authors explain that uniform transactions are highly important in order to ...
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1answer
240 views

As of 2017-09, Has there been talks or test implementations of making Litecoin anonymous / untracable like Monero or Zcash?

Being that Litecoin is more likely to implement experimental features before Bitcoin. As of today 2017-09, has there been discussions or test implementations of making Litecoin anonymous like Monero's ...