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2
votes
1answer
30 views

Are public keys and their corresponding hash values both added to a BitcoinJ Bloom filter?

The paper, On the Privacy Provisions of Bloom Filters in Lightweight Bitcoin Clients has this to say about Bloom filters in SPV: ...Indeed, in current implementations of SPV clients [BitcoinJ], ...
5
votes
1answer
65 views

Procedure for calculating taint?

I'd like to understand taint analysis quantitatively. Blockchain.info offers a service that will calculate taint, but I've found no good explanation for how taint is calculated. The best (and only) ...
5
votes
0answers
33 views

Bitcoin privacy metrics?

I'm looking for a numerical privacy scoring system that estimate the degree of linkage between the members of a key pool (or even just individual key pairs). Ideally, the method should be easy to ...
2
votes
1answer
95 views

Alternative to run Bitcoin over Tor

I know running Bitcoin over Tor isn't a good idea: Bitcoin over Tor isn’t a good idea. My question is: there are any alternative to hide the IP to the network safely? Using a proxy, if you don't full ...
3
votes
3answers
246 views

Can same private key generate multiple addresses?

Is this possible using some clever bitcoin script? The intention is to get more privacy. I can give different addresses to different people still no one can guess how much I make in total. I can do ...
2
votes
3answers
130 views

Preventing the exposure of public addresses on a website

Rather than having a single, fixed address, I want to generate a new address on my website every time a user request comes in. I'm concerned about google or another web crawler indexing my website ...
3
votes
2answers
75 views

Remove address from sequence in HD wallet

Is there a way to eject an address out of the sequence of an HD wallet? Lets say an address was used for a political donation to a regime in Namibia that may get international condemnation a few ...
3
votes
4answers
508 views

HD wallets and address reuse

HD wallets create a series of addresses, and then when one address has received an input it will give you a new address that hasn't received inputs yet So in the idea of you sending yourself bitcoin ...
1
vote
0answers
64 views

How do coinjoin and sharedcoin work? How to make it make it hard to pinpoint bitcoin sender wallet

I would like to implement a way for bitcoin transactions to be untraceable. EX. user1 on my site wants to send bitcoins to user2. How would I go about mixing the coins so user2 doesn't get user1's ...
1
vote
1answer
89 views

colored coin possible with ring signatures and stealth addresses?

It is understood that colored coin is possible with stealth addresses, but what about ring signatures such as how they are used in the cryptonote protocol (Monero, Bytecoin)? I feel like coloring the ...
1
vote
1answer
88 views

Why does bitcoin use public keys as pseudonyms?

Why does bitcoin use public keys as pseudonyms? Is there any reason for that? What are the advantages of using public key as the pseudonyms? Highly appreciate if someone can give me an answer.
4
votes
1answer
131 views

Do bloom filters protect against a persistent eavesdropper?

As far as I understand it, bloom filters can be defined with some target hashes and false-positive rate. When filtering the blockchain, all of the target transactions are guaranteed to be found, but ...
1
vote
0answers
108 views

What can a US citizen do regarding the theft of Mt Gox PII data (Passports, etc) [closed]

A hacker is selling Personally Identifiable information (PII) stolen from Mt Gox. What can a US citizen do to protect their identity? What steps should they take? Should a passport be cancelled? ...
2
votes
1answer
705 views

Does Blockchain.info track IP addresses?

I use Blockchain.info for my wallet, I use a secure anonymous email address. My name and identifying information is never connected with my bitcoin, is it anonymous? How can I keep my bitcoin ...
2
votes
2answers
128 views

How can using Bitcoin with Tor improve privacy?

As far as I understand Bitcoin, user privacy and anonymity are hard to guarantee in the presence of multi-input transactions and shadow addresses. Some sites suggest using Tor to hide the source of a ...
18
votes
3answers
2k views

What is a stealth address?

Stealth addresses are mentioned in the context of privacy of bitcoin transactions. What are they and how would they work? Can they provide 100% anonymity?
0
votes
2answers
110 views

About to open my first wallet

a couple of question before I have my own wallet. Does having a wallet require personally identifiable information? Do I need to use my real first and last name or company name, etc? It seems that ...
1
vote
2answers
302 views

Holding of 9% of all bitcoins?

In this discussion: http://bitcoin.stackexchange.com/a/9057/10490 One of the users mentions a wallet with 9% of all bitcoins. My question is: Is this true? What could be the source of this ...
6
votes
1answer
230 views

Bitcoin Node Data Leakage

Besides an IP address and broadcasting transactions, what other pieces of information can be derived from a Bitcoin node in the network?
1
vote
1answer
170 views

Are there any Web Crawlers for Bitcoin addresses?

In an effort to "track the chain" I wonder if there are any Bitcoin web crawlers that specifically look for Bitcoin addresses. Following on to that question, are there any groups/volunteers/ people ...
0
votes
1answer
62 views

Large pool of addresses means more anonymous? how?

For an average end-user, if bitcoin-qt is configured with a large pool (1 billion) of Bitcoin addresses, then will it increase user / transaction anonimity?
5
votes
1answer
240 views

Is an exchange a good substitute for a mixing service?

Isn't an exchange such as MtGox essentially a mixing service? I might be wrong, but can somebody trace coins when they are paid to one address, possibly exchanged, and another amount is paid back from ...
2
votes
1answer
56 views

How would a P2P “Collective Transaction” be implemented (to increase privacy)

In this thread, Luke Jr mentioned Collective Transactions would be a way for clients to increase anonymity when issuing transactions. How would such an implementation work? (Please provide ...
0
votes
1answer
92 views

People who don't broadcast their IP address?

At http://bitcoin.stackexchange.com/a/9807/5228 Tom van der Woerdt wrote "people who don't broadcast their IP address". What did he mean by that? Is there a way to set up a particular Bitcoin client ...
4
votes
2answers
458 views

Watching and spending from a huge number of offline private keys

We plan to accept bitcoins on our eshop website. What we want plan on doing is: 1) Keep all private keys always offline (cold storage). 2) Generate at least 100,000 keypairs of which only one will ...
5
votes
3answers
648 views

Are mixing services dangerous?

I'm thinking about using a mixing service like Blockchain.info's Shared Sending. I don't have anything to hide, it's just about privacy. My concerns are about where my bitcoins will go. I'm sure some ...
1
vote
0answers
140 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 ...
11
votes
3answers
2k 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 ...
12
votes
1answer
198 views

What are the privacy implications of filtered blockchain downloads?

There is now "Bloom filter" support in the network protocol for sending only relevant transactions to lightweight clients. What are the privacy implications of the bloom filter? Does it leak any ...
0
votes
1answer
245 views

Instawire fees over Bitcoin Central fees and their respective KYC policies?

Instawire, Bitcoin-Central, Instawallet, Paytunia and Paymium are seem to be closely related, they cross reference each other on their sites, though their respective guarantees for their services are ...
9
votes
2answers
654 views

Anonymity through paying by bitcoin

I am considering the VPN service Privateinternetaccess. One of it's payment methods is bitcoins. As described on this page paying with bitcoins strengthens anonymity. In contradiction, this page ...
5
votes
1answer
441 views

What's the risk of publicizing a Bitcoin address?

What's the risk of public Bitcoin address, except person - account link is publically known. Or, is it preferable to have one such account?
1
vote
0answers
136 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 ...
3
votes
2answers
457 views

Will an approved Bitcoin-like system replace Bitcoin?

What is the chance of another Bitcoin-like currency system to replace Bitcoin? Will Bitcoin still coexist with such systems? Will it affect then-current Bitcoin exchange rate? By Bitcoin-like, I ...
5
votes
1answer
556 views

Can a Bitcoin server have a .onion ToR address?

Is it possible for a Bitcoin server to have a .onion ToR address? If so, are there any in existence today? (Note: this is an alternative to hiding addresses via the Azure Service Bus)
3
votes
4answers
4k views

How do I pay for something anonymously from the UK using bitcoins?

I've seen the following guide but it's no good as I can't use bitinstant from the UK. Can someone recommend an alternative? Step 1. Download and install TOR Step 2. While using TOR create a Tormail ...
0
votes
1answer
220 views

Are there any commercial nodes available so my transactions won't show my IP address?

Oftentimes my own IP address shows up as the "Relayed by ip" piece of data reported by Blockchain.info. Is there a commercial node available that I can conract with to act as relay so that my IP ...
3
votes
2answers
392 views

Can bitcoins be traced by pool workers?

A lot of people doing bitcoin mining participate in pooled mining. When participating in pooled mining the workers perform some mathematical calculation (that I have actually not understood) and are ...
4
votes
2answers
861 views

How much anonymity do mining pools provide?

How much anonymity does an average mining pool provide to the user (securing your email, other personal information)? What is the best pool to use if you want to remain anonymous, and which is the ...