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.

32 questions with no upvoted or accepted answers
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1answer
355 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....
3
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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 ...
3
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0answers
57 views

What does the Payment Hub learn about its users in TumbleBit?

When a user participates in transactions on a TumbleBit payment hub, what does the payment hub learn about the user's transactions?
3
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0answers
165 views

What additional actions should an ethical Bitcoin-related business take with each transaction?

I'm considering starting an ethical business for users that accepts Bitcoin as a payment. My intent is to abide by all laws and interpret them in an appropriate manner. My intent is to abide by ...
2
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0answers
47 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 ...
2
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0answers
20 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 ...
2
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0answers
287 views

zk-SNARKs vs. Zk-STARKs vs. BulletProofs? (Updated)

zk-SNARKs, Zk-STARKs and BulletProofs are three major zero knowledge proofs to provide privacy for the blockchain technology. If we can compare them, (1) Bulletproofs and Zk-STARKs require no ...
2
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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 ...
2
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0answers
112 views

Method to measure “distance” between 2 transaction id's

Is there a blockchain tool/code that takes two BTC transaction ID's and determines a distance between them. It's 2017 and Bitcoin Privacy (aka trying to walk around in the public without a sign over ...
2
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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 ...
2
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0answers
111 views

Proper use of mixing service

Everybody knows that bitcoin blenders anonymize your coins but shouldn't you follow some precautions for your mixing to be effective? I suppose that mixer is fair (it won't steal your money and does ...
2
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0answers
925 views

Anonymous (no ID, no verification) Payments to PayPal?

Not looking for a discussion on how Bitcoin payments can be traced and it's not truly anonymous. I'm not looking for total anonymity, I just don't want the merchant or payment processor to identify me....
2
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1answer
33 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 ...
1
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1answer
93 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 ...
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0answers
60 views

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 ...
1
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0answers
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 ...
1
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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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0answers
65 views

Zerocash: how to verify that a mint transaction is correct

I'm reading the whitepaper of zerocash and I don't understand how a mint transaction works. Here are my following questions: How do you prove that you have enough bitcoins to form a certain amount of ...
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0answers
102 views

Why do most alt coin developers choose to remain anonymous?

Is having a known public identity not helpful in building reputation for a project? Are the privacy and security concessions associated with revealing your identity not worth the perceived benefit?
1
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0answers
980 views

bitmixer.io usage

I am somewhat confused by the bitmixer.io site. I can enter the Adress, where I want to send bitcoins to, but I have no idea how to go from there. How can I send bitcoins into the service? Can anyone ...
1
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0answers
195 views

How do I implement a blind multisig protocol?

I'd like to implement a 2-of-3 multisig protocol such that: Three parties generate private keys The private keys are never physically combined on one system - each private key never leaves its system ...
0
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1answer
73 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 ...
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0answers
24 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 ...
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22 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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38 views

secure Multi-Party Computation (sMPC) in Enigma?

In Enigma whitepaper (>> Link to the Enigma paper <<), in section 5.1 "Overview of secure multi-party computation", page 4, explains how to divide a secret s into multiple shares, using ...
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11 views

Examples of systems having multiple blockchains

When you first learn about blockchain it is made out to be a single public blockchain that contains all transactions from all users. But when you start considering privacy and performance, it seems ...
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0answers
32 views

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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0answers
19 views

Can “Ring Confidential Transactions” be an alternative to “Zero-Knowledge Proofs”?

According to the Monero's paper on Ring Confidential Transactions, the Ring CT protocol is a currency which: requires no trusted setup, hides the identity of the recipient of a transaction, ...
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0answers
35 views

Why participants transact bitcoins use pseudonyms rather than persistent real-world identitie?

I recently read an article that tries to make reveal the identity of participants which transact bitcoins. my question is why participants use pseudonym instead of real-world identities and cause ...
0
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1answer
228 views

Bitpay Without Credit Card

I am having trouble finding this information so I would like to ask those who use BitPay: Can you create a BitPay account and spend coins without having a Credit/Debit Card associated with your ...
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211 views

Can I anonymously self-publish books on Amazon and get paid in Bitcoin?

I want to publish the book under a pseudonym, or better yet, anonymously! I had been looking into Amazon Kindle Direct Publishing. I’d also like to use an anonymous e-mail address. Would it be ...
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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 ...