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.
408
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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?
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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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2
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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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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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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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0
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55
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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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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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290
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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 ...
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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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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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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 ...
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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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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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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 ...
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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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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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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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259
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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?
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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 ...
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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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4
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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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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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730
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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://...
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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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358
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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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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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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 ...
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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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How blockchain privacy works
I have just read this which talks about creating private blockchains and using a unique public/private key per transaction so you can't be traced. There are also "Zero-knowledge proofs" which I'm not ...
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off-chain payment channels: Do we need to trust "Payment Service Providers"?
A paper entitled: "Privacy in Bitcoin Transactions: New Challenges from Blockchain Scalability Solutions" has tried to investigate privacy issues of the Bitcoin influenced by the solutions for ...
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Single "Multiple Inputs Tx" vs Multiple "Single Input Tx"
Alice owns three addresses A1, A2, A3. She decides to collect the coins held by these addresses into a single coin so she generates a fresh new address A4 for that.
She has the following two options:
...
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Information to recipient of the transaction
I have some questions of the transactions bitcoin,
In a transaction bitcoin, there is not information on the recipient, right?
How do services such as blockchain.com track information about a ...
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Why does my public IP show a Bitcoin Node is running when it is set up over Tor?
I've set up my node to run exclusively over TOR. But when I check https://bitnodes.earn.com/ and a few other sites with my public IP to check if a bitcoin node is accepting incoming connections, it ...
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How is my real identity linked to my bitcoins?
I am new to bitcoin and would like some clarification on its anonymity.
Example: i buy bitcoins from an exchange and send them to my bitcoin wallet.
The addresss that i sent the bitcoins to would be ...
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274
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Any privacy considerations regarding allowing inbound connections for a Tor full node?
I wanted to know if there's any privacy considerations to take into account when opening the bitcoin ports on the router for a bitcoin node.
I'm using -onlynet=onion in the bitcoin.conf file and I ...
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Is the unencrypted copy of the wallet still usable after a copy is encrypted?
My wallet is not protected with a password, I have a few receiving addresses generated and a some funds in it, then I make a copy of the wallet and I set a password on this one.
Will the old ...
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Is there actually a dilemma of whether or not to publish channel states for LN nodes?
I've heard that there is such a dilemma for LN: if channel states were not published, the payer will not able to find any viable path, unless he takes brute-force-like probing approach (which looks ...
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Can PUSHDATA/OP_RETURN be used to break a trail of transactions permanently?
I was reading the Bitcoin wiki on how the Bitcoin protocol has no "From" address and the closest thing to a from address is a "previously receiving address".
The article then proceeds to show a ...
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Do confidential transactions produce an UTXO
There must be magical cryptographic reason why CT doesn't create an UTXO.
If it did make an UTXO, it'd be trivial to calculate the input + output right?
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Deanonymizing dust attack
What is the counter measure against dust attack, in case somebody tries to deanonymize me?
Is there a possibility how to prevent somebody to send you intentional small dust, so that he can track your ...
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How much bitcoin is being sent to someone else in this transaction?
From this link which is a bitcoin testnet transaction.
How can we be sure that this transaction spent a certain amount of satoshis to an address from another wallet? In this case the transaction is ...
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Is there an approach to exchange Bitcoin with formal currency with keeping anonymity? [duplicate]
Apparently, Bitcoin preserves anonymity of users such that nobody is able to know who is behind of an account address. But If this user intends to exchange a bitcoin with a formal currency, eventually ...
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Do the channel balances get publicly announced in real-time on Lightning Network?
In Lightning Network, is the balance publicly announced in real-time?
On the one hand, it should be public as it is crucial to the routing mechanism.
But, in case that the balance might reveal some ...
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Can't understand specific problem of Bitcoin anonymity
There is an problem shown in bitcoinwiki:
Someone runs both a money
exchanger and a site meant to trap people. When Mr. Doe buys from the
exchanger and uses those same coins to buy something ...
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How can someone get my private data (such as email, name, IP ...) from bitcoin transaction?
I am curious about privacy of bitcoin transactions. I heard that if you are good enough at hacking, you can get private data from bitcoin transaction, or associate someone to transaction. How is it ...
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Can "Confidential Addresses" preserve user privacy?
Can using "Confidential Addresses" be an alternative to zk-SNARKs to provide an acceptable privacy for a user?
And when we talk about "Confidential Transactions", does it mean we are using "...
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