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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8
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1answer
113 views

Where can I find research on wallet fingerprinting?

@raw_avocado asks on Twitter: I remember reading at some point something about how you can identify transactions made by specific wallets because they have a specific fingerprint because of how they ...
2
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1answer
49 views

is my xPub published when I make a payment? (wallet privacy)

I'm generating new addresses for every payment I receive, but what happen when I transfer the bitcoins from my wallet to another address? is my xPub exposed when doing that (maybe to the bitcoin node?)...
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43 views

Dandelion++ for Bitcoin

Dandelion BIP: https://github.com/bitcoin/bips/blob/master/bip-0156.mediawiki The article that I read about Dandelion++: https://www.monerooutreach.org/stories/dandelion.html It mentioned that ...
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2answers
265 views

in bitcoin core, how to use Tor for broadcasting new transactions only?

I have set up a full node with bitcoin core running on the internet. I have also set up a wallet running on a private machine that communicates to the full node to broadcast new transactions. To ...
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1answer
37 views

List of different unknown mining pools

A miner can identify himself when he receive his coinbase transaction, we can view them on website offering block explorer like https://www.blockchain.com/charts/pools Some of these miners are listed ...
2
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1answer
167 views

Securely erase a previously used address from bitcoin-core

I'd like to completely delete an address from bitcoin-core, in such a way that someone who obtains all the data on my computer could not find out I ever used that address. Is it enough to delete ...
1
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1answer
31 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 ...
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2answers
66 views

Is bitcoin really anonymous?

Let’s suppose i buy some bitcoin on an exchange platform (kraken for example). This platform Ask me some informations (id card). Now, if i transfer all my bitcoins to a physical wallet, then to ...
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1answer
41 views

Chat online using Bitcoin addresses?

I was surfing on the web and trying to find a chat app that uses Bitcoin address instead of phone numbers or any other identifier. Do you know about any project in this field?
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1answer
59 views

How do SPV clients acquire transactions from other nodes and verify that they are part of the blockchain?

I explored SPV clients as a subject from a lot of different resources, but there are a few of things that are keeping me confused: I found out that SPV clients have no mempool even though SPV clients ...
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0answers
53 views

How does a game like Satoshi Dice avoid de-anonymizing users?

When considering games like satoshi dice or many other more typical online casino games, how do they handle awarding prizes? It seems like they pay back to the original input that sourced capital to ...
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1answer
28 views

How would somebody compromise my identity if I generate new receive address in Bitcoin Core?

I open Bitcoin Core and generate a new receive address. I publish this without mentioning my name, and make every effort to conceal my identity in every other way. Some time passes (possibly months or ...
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1answer
31 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
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1answer
49 views

What information can an attacker gain from watching the users behavior in block chain?

Given the blockchain is a public ledger, if user chooses not not change their public key (address) every time they make a transaction, what information can an attacker gain from watching the users ...
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1answer
41 views

Is there any tool to visualize the bitcoin transaction graphs?

I want to visualize the bitcoin transaction graph linked to addresses that could potentially link my addresses and to better chose which coins I would use for which payment to prevent loosing privacy. ...
0
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1answer
30 views

PayJoin privacy only works with specific output sizes?

In the specific example of PayJoin here: https://en.bitcoin.it/wiki/PayJoin the wiki equates a PayJoin transaction as indistinguishable from a regular transaction. However the transaction example ...
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1answer
31 views

Can multiple different addresses in a wallet be linked easily?

Is it easy to link multiple transactions each with a different receive address to the same wallet? What if after going to this wallet the Bitcoin was converted to Monero?
0
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1answer
45 views

How to upgrade a Trezor device without wallet.trezor.io?

How to update a Trezor device without the Trezor backend? The Trezor backend at wallet.trezor.io is suboptimal from a privacy perspective. Many people choose to use Electrum, Wasabi or any other ...
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2answers
52 views

How exactly would anyone know from where I got a given “bit of Bitcoin”, or who I send it to?

Let's say I buy 0.1 BTC using Bisq. Okay, so the person I bought it from will know my name since I have to give it up to make the international bank transaction. And I will know their name because ...
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0answers
19 views

How long until the majority of circulating Bitcoin are involved in a CoinJoin transaction?

This isn't something we can know for sure, but based on the current size and frequency of CoinJoin transactions, how could we approximate the time required until more than half of circulating Bitcoins ...
2
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1answer
55 views

Is it possible to link one single LN node to Bitcoin addresses?

In René Pickhardt's presentation (slide 166) (here is the interesting talk), it's written that on-chain funds and addresses can be linked to LN nodes. How can this be achieved? From my understanding, ...
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2answers
70 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 ...
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0answers
34 views

How private is Strike by Zap? [closed]

I am asking myself how much information can Strike theoretically collect on its users? Does Lightning have any benefits in this case? https://medium.com/@JimmyMow/announcing-strike-by-zap-4f578c7c8984
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2answers
82 views

Can failed Transactions figure out which Channel is exhausted?

According to information in this LND PR the sender of an TemporaryChannelFailure can be determined: In many cases it is impossible for the sender to determine which of the two nodes in a pair is ...
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3answers
143 views

Why does Coinjoin need multiple participants to increase privacy?

Coinjoin is a method that make a transaction with other transaction of other parties to hide the link between txin and txout. In case of this, why we need others transaction? We have many bitcoin ...
3
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2answers
143 views

What is the rationale for the Lightning network's path length limit (20 hops)?

A sender in the Lightning network can choose a path with up to 20 intermediaries (BOLT4). Tor is another network that uses onion routing for anonymity. However, in Tor all paths have 3 intermediaries,...
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3answers
54 views

Bitcoin future mass usage for payments - how feasible is it without real privacy

The bitcoin is by many people believed to be used as a method of payment, just like fiat currencies, in the future. Apart from the other big use case of a stable store of value. But the payment use ...
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1answer
74 views

Bitcoin privacy - current state of privacy BIPs - is mimblewimble broken?

Community, what is the current state of privacy related BIPs? Anything on the roadmap by core devs to be deployed on main chain within the next year? IF yes, could you link me to this BIP(s)? And ...
2
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0answers
84 views

Was the first full node IP address Satoshi's and how did shim hide it?

It is not surprising that people assume Satoshi used ToR when scouring the internets however if my understanding is correct in order for someone to run a full node they need to provide their IP ...
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2answers
74 views

Anonymous transactions with bitcoin core

Is there any chance that people will identify me when I have nordvpn running in the background when making transactions with bitcoin core? Already done this What are you recommendations to stay ...
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3answers
64 views

Can Initial Channel Balances be figured out from the Funding Transaction?

The Initial Funding Transaction happens in Bitcoin and is linked to the Lightning Network. Can an adversary figure out the initial channel balances by identifying the according Bitcoin Funding ...
3
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1answer
115 views

Does Taproot allow CoinJoin-style transactions without revealing all signers?

Taproot allows to hide a script behind a transaction and only release the relevant information when the output is being spent. Would this allow for a construction of a script with N participants + ...
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1answer
633 views

bitcoind and bitcoin-cli and bitcoin-qt

following the hackernoon for full node btc, https://hackernoon.com/a-complete-beginners-guide-to-installing-a-bitcoin-full-node-on-linux-2018-edition-cb8e384479ea i have some small questions, is there'...
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2answers
391 views

How to anonymously and privately purchase Bitcoin through Tor?

How can Bitcoin be anonymously purchased through Tor in a secure and private fashion? My question is related to: How can I setup Bitcoin to be anonymous with Tor? Personal information and bitcoin ...
2
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0answers
22 views

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

What heirarchical 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 ...
0
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1answer
128 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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1answer
61 views

Why is a privacy problem to pay always 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 ...
2
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1answer
41 views

Is it cryptographically possible to have aggregate signature schemes that can improve privacy in UTXO consolidation?

My understanding of Schnorr signatures, Taproot and Graftroot and how they improve privacy in smart contracts / multi-sig is by allowing users to aggregate signatures so the individual signatures and ...
2
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1answer
74 views

Privacy of sending CoinJoined UTXOs from wallet with unCoinJoined UTXOs

If I use something like Wasabi to CoinJoin my UTXOs and then send the outputs to a wallet with addresses containing UTXOs that haven't been coinjoined does this present a privacy risk?
3
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1answer
81 views

What are some proposed privacy features coming to the bitcoin lightning network?

If I'm correct, a bitcoin sent into a lightning channel technically looks like any Bitcoin transaction. From there if the channel never closes, the Bitcoins can essentially stay in a "locked" state in ...
0
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2answers
64 views

How does this time-stamping system work?

There is an online tool called Proof of Existence which uses the bitcoin blockchain to time-stamp documents. I'm reading the documentation but I fail to see how it works. I understand that it adds ...
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0answers
27 views

Are there any blockchain's that has a built in tumbler or coin shuffling technology built into their code?

I know dash has some kind of mixing technology in their blockchain using their master nodes, but are there any other blockchains that has a built in coinjoin or coin shuffling technology built into ...
3
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2answers
357 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?
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1answer
125 views

solving subset sum for two sets

Some bitcoin transactions (especially CoinJoin transactions) include two or more sub-transactions. for example, consider a transaction with Inputs = [2, 3, 4] and Outputs = [4, 5]. In this example, ...
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2answers
480 views

How can I hide my bitcoin transactions to protect anonymity from others?

Please take a look at this transaction link of bitcoin : https://www.blockchain.com/btc/tx/blablablabla My bitcoin address is : blablablabla You can see all of my transactions by this link : https://...
6
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1answer
145 views

Why is the length of the transport messages on the lightning network encrypted?

From BOLT 08 we can see that every message is sent in the following way: 2 byte: length 16 byte: MAC [length] byte: Encrypted message 16 byte: MAC In reality these messages will be send over TCP/...
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1answer
146 views

What's partial spending? What does avoidpartialspend do?

Group outputs by address, selecting all or none, instead of selecting on a per-output basis. Privacy is improved as an address is only used once (unless someone sends to it after spending from it), ...
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1answer
44 views

Why is the privacy for using watch tower services increased with unpredictable commitment tx ids?

In the open channel message in BOLT 02 the following statement is written about the various basepoints. The various _basepoint fields are used to derive unique keys as described in BOLT #3 for ...
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2answers
192 views

How secure is using TOR in Lightning Network?

In following paper (Link to the paper) we read: "combining Tor and Bitcoin creates an attack vector for the deterministic and stealthy man-in-the-middle attacks. A low-resource attacker can ...
0
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1answer
271 views

Does a HD Wallet log my IP when i do a transaction?

Companies like BitPay and Electrum, can log my IP when I make a transaction, right? If so, should I use a Web Wallet (plus VPN) for transactions?

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