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52 votes

Are there any _true_ anonymous cryptocurrencies?

The short answer is no. The long answer is split into three parts, each headed by a bold word. I will talk about the existing privacy tools in Bitcoin. I will talk about some pie-in-the-sky ...
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41 votes
Accepted

What is a stealth address?

As I understand it, the "stealth address" is intended to address a very specific problem. If you wish to solicit payments from the public, say by posting a donation address on your website, then ...
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22 votes

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

I'm curious as to why Bitcoin has not perused a similar path to privacy. I want to start by commenting on the phrasing of this question. Bitcoin is defined by the consensus of its users, and isn't a ...
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20 votes
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Are Monero Transaction Anonymous?

Short answer: yes, it will be anonymous Long answer: The following applies to all Cryptonote based coins, unless stated otherwise: On the blockchain, all addresses are one time addresses. In ...
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  • 786
17 votes
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Is my account balance publicly visible?

If your business partner knows your address, they can learn the transaction history and balance of that address. Often it is possible to guess or deduce that other addresses also belong to you, but ...
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  • 63.4k
15 votes

Is my account balance publicly visible?

If I'm sending someone my wallet-address, am I making my account balance visible to him? Yes. all transactions are public, means if I know the wallet address, I can reconstruct the current ...
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  • 966
12 votes

Are there any _true_ anonymous cryptocurrencies?

First of, I am a Monero core developer. I'll try to remain as factual and objective as possible, though. Now, for the simple answer: use Monero And for the longer answer: read Andrew Poelstra's very ...
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11 votes

Why is the ledger public?

When Bitcoin was invented, Blockchain analysis was not as advanced as it was today and pseudonymous transactions were believed to be closer to anonymous than they are with Bitcoin today. Under the ...
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10 votes
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Can I send bitcoin to other address in my wallet to provide anonymity?

Let's assume you're the outside observer. You see 1 BTC go from aaa to bbb, then from bbb to ccc, then from ccc to ddd, and them from ddd to zzz (zzz being associated with service Z). Can you see how ...
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  • 3,154
10 votes
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Why is the length of the transport messages on the lightning network encrypted?

TCP and other stream based protocols do not have a 1-to-1 correlation of application level messages and IP packets. If you call send() 3 times, it might result in sending a single IP packet over the ...
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  • 3,220
9 votes

What are tainted coins exactly?

The term "Tainted Coins" is often misinterpreted as a measure of provenance. That's understandable considering the traditional definition of the word "tainted" coupled with the reality that many ...
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  • 101
9 votes
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Can same private key generate multiple addresses?

One private key maps onto two addresses - one that uses an uncompressed public key, and one that uses a compressed public key. What you might also be interested in is a deterministic wallet - a ...
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  • 42.7k
9 votes
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How does not practicing address reuse hurt my privacy?

There's a bigger attack surface for someone that wants to doxx you. They only need to link a single transaction to your real life person to know all the transactions you've participated in. A single ...
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  • 7,629
9 votes
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Privacy friendly payment processor

I'm pretty sure that all crypto payment processors that deal with fiat <-> cryptocurrency exchanges are doing AML/KYC routines including chain analysis. That's not only true for BitPay and Coinbase ...
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  • 381
8 votes
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BitLaunder's mixer vs "major exchanges" mixer

It probably doesn't give you more security, and in fact if the mixer service's coin volumes are low, which they likely are, and dependent on whatever their turn around time may be, and dependent on ...
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  • 419
8 votes

Deanonymizing dust attack

A deanonymizing dust attack works by sending dust to large amounts of addresses. The assumption is that when people send transactions/perform consolidations in the future, dust from multiple addresses ...
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  • 16.5k
8 votes

What exactly is "privatekeys.pw"?

The site is a joke, or at best a confusing attempt to educate. It literally lists all private keys, from low to high, as private keys are just numbers. There are of course way more than can be ...
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7 votes
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Why does bitcoin use public keys as pseudonyms?

More accurately, the pseudonyms most commonly used are addresses, which are derived from public keys (not the longer public keys themselves). In order for Bitcoin's idea to work, you must have coins ...
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  • 4,347
7 votes

How do Reusable Payment Codes work?

The gist of the reusable payment code BIP is that you can gain some measure of address privacy by combining BIP32 (hierarchical deterministic wallets) with Diffie-Hellman key exchange. To understand ...
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  • 7,629
7 votes
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Can you detect that the addresses generated by an HD wallet came from a single wallet?

No. All addresses generated by HD derivation are indistinguishable to someone who does not know the parent's master key (the private one for hardened derivation, the public one for normal derivation)....
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7 votes
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Do confidential transactions produce an UTXO

In Confidential Transactions (as used in Blockstream's Elements and Liquid), there are still identifiable UTXOs. The only change is that instead of the amount, a homomorphic commitment to the amount ...
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7 votes

Why do people claim that governments cannot confiscate Bitcoins?

While it is true that Bitcoin can still be physically taken away from you, it is still much harder to do that than it is for a government to confiscate your fiat stored in a bank account (as most fiat ...
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  • 61.4k
7 votes

What are the advantages/disadvantages to using the same Wallet Address?

Questions about altcoins are off-topic here, but the answer is essentially universal: if you re-use addresses, especially because of a desire to think of them as a long-term identity, you're ...
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6 votes

What are the privacy implications of filtered blockchain downloads?

I know it is an old question, but it deserves an updated answer. Since the introduction of BIP37 (=SPV with bloom filters) a number of serious privacy vulnerabilities have been discovered. By using ...
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  • 754
6 votes

Will Confidential Transactions allow us to reuse addresses safely?

My understanding of confidential transactions is that it only hides the amounts, not the addresses involved (someone please let me know if this is not the case). Since only the amount is hidden, ...
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  • 13.7k
6 votes
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Bitcoin node Decentralization

Yes, independently operated nodes help decentralization more than the same number of nodes operated by a single entity. That's basically the definition of "decentralization" in this context. That is ...
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  • 8,724
6 votes
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Is It Possible to Prove Ownership of Public Key Hash without Public Key?

The simple answer is no. A hashing algorithm is ment to be a one-way function. If it is possible to recreate the public key from the hash, this means that the hashing algorithm is broken. However ...
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  • 536
6 votes
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Are there any risks of publicizing a Lightning network invoice?

Does it affect -most importantly- the safety of the funds? It does not. Funds are not affected by publishing a LN invoice. Does it negatively affect the privacy or something else? If a lightning ...
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  • 61.4k
6 votes
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How can I hide my bitcoin transactions to protect anonymity from others?

Your address is a classical 1 (Pay-to-public-key-hash) address. Your friend has a newer Bech32 Pay-to-Witness-public-key-hash-type address. The block explorer you referenced is partially compatible ...
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