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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6
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2answers
210 views

How to accept donation correctly?

Imagine a web page that wants to accept Bitcoin donations. A naive approach is to provide a single address on the page and that's it. The problem here is that the address is known to everyone and if ...
0
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2answers
330 views

Privacy: How should I handle UTXO's?

We know that, for security and anonymity, we shouldn't reuse addresses. Also, there is the idea of change avoidance to protect ourselves from any number of change detection heuristics. But I find ...
2
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2answers
107 views

Why don't add salt to the tapscript in Taproot?

The corresponding Merkle proof needs to be given when unlocking UTXO using MAST, where the hash of an unused script will be included. For the observation, it seems possible to guess the unused script ...
1
vote
2answers
59 views

If you wanted to privately receive bitcoin from someone, how would you do that?

I do not like to be tracked when receiving or sending bitcoins. How do you make a secure wallet? If you wanted to privately get bitcoin from someone, how do you get it? How do you get the address to ...
3
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1answer
108 views

Coinjoin implementations

What are the different coinjoin implementations being used right now? What are the trade-offs involved in using one of them?
5
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2answers
896 views

What exactly is "privatekeys.pw"?

Today, I stumbled upon this bizarre website: https://privatekeys.pw/ Bitcoin Private Keys Directory The FAQ makes no sense at all and doesn't explain what it is about whatsoever. What could they be ...
1
vote
1answer
61 views

Where does a single script go in the Taproot tree of a script path spend?

If I only have a single script for the script path does the hash of the script get placed at the top of the Merkle tree (instead of the effective Merkle root) or does it get placed in level 1 of the ...
1
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2answers
491 views

Should I be using the "encrypt wallet" feature in Bitcoin Core?

All my wallet.dats have no password. However, the internal hard disk where the "live" one is located is encrypted, and so are the offline storage devices where I have my "cold" ...
0
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2answers
68 views

Are transactions from two separate bitcoin accounts on Ledger Nano S independent of each other?

John Doe creates two separate bitcoin accounts on a ledger nano s and funds the accounts from two separate sources. The first funding source is a known terrorist organization and the second funding ...
31
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6answers
12k views

What are tainted coins exactly?

I've come across the term of a tainted coin several times now. I understand that coins, or better, the origin of a coin can be traced throughout the blockchain. I've read that bitcoins can be ...
1
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1answer
30 views

How to do experiments on bitcoin blockchain?

I come up with a protocol that can enhance the privacy of bitcoin. I want to do some simple experiments on the bitcoin blockchain. However, doing experiments on the real bitcoin blockchain seems ...
3
votes
1answer
74 views

Why is it a privacy problem to always pay to the same address?

I know as a merchant it is not a good idea to receive all payments to the same address because then people could track our balance. But I don't understand why it could be a privacy problem if we ...
1
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0answers
45 views

What do people mean when they say that Bitcoin are "unconfiscateable"? [duplicate]

So all my Bitcoin are on an encrypted wallet.dat inside a VeraCrypted USB memstick inside a fireproof safe. While this might stop random a burglar, how does it stop the government from confiscating ...
0
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1answer
52 views

is wallet vulnerable when unlocked for transactions?

is wallet vulnerable when unlocked for transactions?.I recovered a wallet some time ago and all is good.passphrase key all looks good.But a question came to my mind about the moment we make a ...
0
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1answer
34 views

How to edit bitcoin.conf for bitcoin.cli scripting

I want to install Kristaps Kaupe’s scripts on my bitcoin.conf but I am afraid I don't have the technical expertise necessary to make it run. I am simply cutting and pasting it on my bitcoin.conf file, ...
1
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1answer
40 views

Is the Cloudflare proposed ODOH protocol a thing that could improve Bitcoin node privacy?

Recently Cloudflare proposed an improvement to the DNS over HTTPS protocol called ODOH (Oblivious DNS over HTTPS). It allows separating a DNS server into two parts: the resolver and the proxy that ...
2
votes
1answer
37 views

Can everyone see "message signatures" I create & verify?

I need to sign and verify messages on a couple of addresses, and I need to write my full name and address as message. Is there any concern that anyone can read the message(name and address) other than ...
1
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2answers
56 views

Does the concept of a blockchain introduce a violation of privacy?

Per my understanding, in a blockchain system, all transactions are recorded on an immutable ledger. Given this, if you know your friend's public address, wouldn't it be possible to figure out the ...
1
vote
1answer
29 views

How do people know who sent them bitcoin, ex. in case of a ransomware targetting multiple locations?

I have a rough understanding about how bitcoin works and have read about how anonymous it is, or rather how not anonymous it can be in certain situations. But I still do not get how is it possible to ...
0
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2answers
745 views

Received Random Unconfirming BTC

I've been using BTC for years now. This is the first time this has happened. Woke up yesterday to an unconfirmed transaction of around $30. Completely confused, I wondered where this came from. ...
3
votes
1answer
118 views

How will censorship affect the lightning network?

If the Bitcoin lightning network were to become widely used, what will prevent regulators from cutting people off? The lightning network provides participants with the topography for the purpose of ...
1
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2answers
105 views

Physical safety of crypto owner

Let's image a scenario where I buy (or trade) BTC on a regular basis and have a large number of coins in my wallet. Of course I'd like to be able to use my coins whenever possible, exchange with ...
1
vote
2answers
81 views

How Crypto Payment Processors Handle Wallet Balance Privacy?

If an online store accepts crypto payments directly into its wallet there is a problem: "Anyone can make a small transfer to any BTC address derived from the MPK so they can watch the store's and its ...
2
votes
1answer
2k views

Sending Bitcoin from LocalBitcoin to another wallet to secure my funds, does it work?

I have an account with LocalBitcoin, that I use to ONLY fund my backpage account. However, this account is on the clearnet, is linked to my email address and bank account, and has been used without ...
1
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2answers
86 views

How about force the use of unbalanced Merkle tree in Taproot?

I noticed this sentence in Taproot about the MAST build. The remaining scripts should be organized into the leaves of a binary tree. This can be a balanced tree if each of the conditions these ...
13
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5answers
255 views

Privacy friendly payment processor

What is the most reputable Bitcoin payment processor that has privacy friendly terms and conditions? BitPay and Coinbase are known to have used chain analysis to spy on customers. What are the ...
10
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4answers
2k views

Which exchanges are Tor-friendly?

Mt. Gox's sign-up page states: Please be advised that accessing your account via the Tor network and/or public proxies may result in a temporary suspension of your account, and having to submit ...
1
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3answers
144 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. ...
1
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2answers
183 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 ...
4
votes
1answer
129 views

When you make a Bitcoin transaction, can the receiving person (and the world?) really see how much coins you have in the entire wallet?

I really hope that I've got this horribly wrong, but I have to ask... I have this idea, which I base on comments and explanations I've heard over the years, that when you make a Bitcoin transaction, ...
3
votes
2answers
115 views

What is considered to be sufficient anonymity set? [closed]

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-...
2
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1answer
174 views

What are "tagged" Bitcoins?

I was reading about the Sheep Marketplace: Victims of the theft have attempted to identify the thief by sending "tagged" bitcoins to his accounts, using the public nature of bitcoin ...
2
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0answers
40 views

What hierarchical deterministic derivation path is used for FIDO authentication on a Ledger Nano S?

What hierarchical deterministic derivation path is used for FIDO authentication on a Ledger Nano S? Does it ask for a different key each time or is it always the same key? If I connect to Google for ...
8
votes
2answers
2k views

Is there something about Bitcoin that prevents us from implementing the same privacy protocols of Monero and Zcash?

Certain coins like Monero and Zcash implement privacy protocols that make it nearly impossible to trace origin and destination of transactions - making them completely anonymous. I'm curious as to why ...
3
votes
4answers
706 views

Why should I use a Bitcoin Mixer?

I understand that I can use Bitcoin anonymously using Bitcoin Core with Tor running a full node or with Electrum using Tor running an SPV node, why should I also use a Bitcoin Mixer?
0
votes
1answer
47 views

Can someone recognize any two addresses (generated by hardware wallet) come from the same hardware wallet/mnemonic seed?

Can someone recognize any two addresses (generated by hardware wallet) come from the same hardware wallet/mnemonic seed?If I generate multiple cryptocurrency accounts/addresses in ledger live,is it ...
0
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0answers
61 views

What is it that frees Bisq from all these KYC/AML laws and regulations?

I feel as if I should probably not ask about this, and instead just quietly go on using it in my little corner, not bringing any attention to its existence, but I still must ask: What is it that ...
1
vote
1answer
133 views

Why do people claim that governments cannot confiscate Bitcoins?

Let's say that I practice impeccable data security processes using dedicated devices, encryption, and no clear-text backups. Even if they cannot find all of my backups, this doesn't protect me from ...
2
votes
1answer
63 views

Can lightning transaction participants link the transaction to on-chain funding transaction UTXOs?

I'm curious about whether participants in a lightning transaction gain information about the funding UTXOs of other participants. Let's say Alice pays Bob using Lightning, and Alice's payment is ...
1
vote
1answer
75 views

Privacy and Anonymity in Bitcoin

I hope this is not a duplicate. I have seen lot of people confused between terms "PRIVACY" and "ANONYMITY". Context is Bitcoin transactions and protocol. What does privacy and ...
1
vote
1answer
36 views

Are there any privacy benefits in using a separate wallet in Bitcoin Core to separate myself from my service?

I currently run Bitcoin Core with the following wallets loaded in: hot.dat. Contains the smallest possible sum of Bitcoin. Unencrypted and used by myself for various personal Bitcoin purchases, and I ...
0
votes
0answers
71 views

How many hops does Coinbase and other exchanges track your movement of BTC when it leaves their exchanges?

I've read reports of Coinbase users getting an email stating that they detected their Bitcoins being moved to an unapproved exchange or site after removing their bitcoins off of the exchange. What is ...
3
votes
1answer
177 views

bitcoin-core automatic coin selection

for business reason i need to use the bitcoin-core (v0.20.1) automatic coin selection feature and few days ago i saw a transaction come out that left me puzzled, it was like that: input 0.00017[...]...
3
votes
2answers
149 views

Why do people apparently "look up Bitcoin addresses on websites"?

I often hear things such as: Remember, if you look up an address on Blockchain.info or something, they will have a record of your IP address being interested in that address and thus associate it ...
6
votes
1answer
266 views

Why is it recommended to "not send round number amounts when making payments" for increased privacy?

I got this advice today to increase my Bitcoin privacy: Do not send round number amounts when making payments (eg send 0.00104103 BTC, instead of 0.001 BTC) Why do they say this? Why does the amount ...
0
votes
1answer
74 views

How can I get the transaction history of a bitcoin address?

Lets say that I have a bitcoin address that is not owned by me. Is it possible to get that address's full transaction history (send/receive addresses and amount), and if the owner bought bit coins ...
1
vote
1answer
124 views

Why is it impossible to get a straight answer as to whether Bitcoin is anonymous or not?

Yesterday, I asked a question which got linked to this answer: Is it true that all the bitcoins in existence are on the blockchain (the ledge), but it just depends on who the owner (address) is? ...
0
votes
1answer
48 views

Bitcoins Anonymity - Do Exchanges Break It?

If I used to pay for bitcoin for something illegal (as defined by my country), and the public key of the wallet I used to spend the bitcoin became known, could authorities subpoena bitcoin exchanges ...
1
vote
1answer
30 views

What would stop some major company from blacklisting specific Bitcoins based on the "inputs" used and their "origins"?

I remember news about some exchange actually banning users based on some kind of "reputation score" on the inputs/coin parts they controlled/used, or got Bitcoin sent to them from. So even ...
4
votes
1answer
106 views

Are "coin mixers" actually a real thing? Can they be trusted?

Ever since I started hearing about Bitcoin, people have been mentioning "coin mixers" to me, and told me to use them. However, even early on, when they were practically throwing away ...

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