Questions tagged [address-reuse]

Collects questions about using the same address on more than one occasion to receive payments, and the resulting issues such as multiple inputs in the blockchain referencing utxos associated with one address.

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1answer
47 views

Why do self-loops exist in the bitcoin transaction graph?

I have obtained bitcoin data from block explorer and created the transaction graph. The graph consists of millions of nodes and edges. i wrote a query that creates a relationship from source address ...
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1answer
24 views

Any good reason to prevent duplicated address in send transaction for Pos coin? [closed]

The use of sendmany in a PoS coin is an obvious source for preparing stake inputs, however it historically has been prevented to send to duplicate addresses in one transaction with such an error as "...
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1answer
65 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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1answer
55 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 ...
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0answers
48 views

Can I continue to use an old Bitcoin address? [duplicate]

I have a wallet on Blockchain.info and they generated a Bitcoin address for me. Now, I have another Bitcoin address. Can I still use my old Bitcoin address?
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1answer
22 views

How many non-web wallets discard private-keys? or How common are non-deterministic wallets?

I'm concerned about non-web wallets that discard private keys after use. Web wallets - share addresses between users, so the user can consider all private keys to be immediately discarded. ...
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1answer
39 views

Why is there sometimes no output that sends funds back to the sender's address?

'A' has one bitcoin. 'A' tries to send a 0.5 bit coin to 'B'. Two utxo are created. First, "utxo" sends "B" 0.5 bitcoin. Second, "utxo" where "A" remits remaining bitcoins to "A" except for 0.5 ...
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1answer
44 views

How many wallets don't support address reuse? (for refunds)

I have implemented an automated bitcoin refund function that sends funds back to the address that was used to sign the incoming transaction. How many wallets fail to support address reuse/refunds? ...
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1answer
133 views

Are all UTXOs locked by an address spent in a transaction?

Imagine I have 2 UTXOs locked by my address, each of which allows me to spend 5 bitcoins. If I subsequently want to send just 2 bitcoins to someone else, will both UTXOs be used as inputs in the ...
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2answers
47 views

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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1answer
85 views

Send and Receive BTC with Same Address from 1 Person

Is it possible to : I sent BTC to A from Address1 and I asked him to send me BTC (different amount as I send him) to Address1 (same address with I sent him before)..?
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1answer
240 views

How to edit the label of an existing address exactly like in bitcoin-qt but instead using RPC calls?

I am trying to edit the label of a bitcoin address in my wallet outside of bitcoin-qt. Currently I only know of 'setaccount' but it results in two addresses after editing one, it assigns a new address ...
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2answers
147 views

If I reuse the same address can a previously used transaction be reused?

I was wondering, if I used an address adr0 to spend some coins in a transaction tx0 that give the coins to a different address adr1, and eventually, after some time, I receive some (completely ...
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1answer
57 views

XAPO's flow from wallet to vault - a different wallet address used for the transfer

I have a XAPO account and I moved a bitcoin from Bittrex from XAPO. Now, XAPO has provided me with a wallet address a1. Now when I have moved my bitcoin from my bitcoin wallet to vault and checked ...
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1answer
139 views

I read that Bitcoin addresses are single-use tokens. Is it my responsibility to generate new ones in Electrum?

I am quite new to this, and started using Electrum today. I read on the Bitcoin Wiki that "unlike e-mail addresses, people have many different Bitcoin addresses and a unique address should be used for ...
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1answer
1k views

Is there a way to generate new addresses for someone else's wallet?

I thought I saw this feature existed somewhere but I can't find the reference. Use Case: Alice needs to keep sending multiple bitcoin transactions to Bob, and wants to use a different payment address ...
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1answer
86 views

Is it secure to put a wallet address on one's business cards as a QR code?

As a company, we're making business cards, and would like to put our bitcoin addresses on our business cards as QR codes. Yet, I know that it is a best practice for wallets to cycle addresses - I mean,...
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1answer
80 views

How Bitcoin wallets avoid address re-usability?

As we know, address reusability compromises both privacy and security. My question is how Bitcoin wallets avoid address reusability? Is wallet generates an address from index 1 and scan blockchain ...
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1answer
1k views

If the bitcoin address changes every time, why there is more than one transaction for an address in the ledger?

I was checking a random address in blockchain.com, there are alot of transactions that is done over this address. While in the website it is mentioned that the address is changing everytime! So it ...
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2answers
149 views

Sell bitcoin to account

So let's say I have multiple bitcoin addresses (some of them already received bitcoins), created a new bitcoin address, received bitcoins on it and would like to use the very same address to send them ...
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1answer
87 views

Bitcoin's change back

I'm starting a new project that uses bitcoin. I'm afraid some feature can't be done, or aren't safe. I'd like to validate some ideas: I'll create a wallet/address and publish it on the project's ...
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2answers
238 views

Security implications of regular saving into cold storage

I am thinking about following this plan: Regularly buy bitcoins in an online exchange, 100€/month at market prices. Once the balance in the exchange exceeds a certain limit (500€), move those ...
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1answer
56 views

Privacy concerns for a publicly displayed Bitcoin address

If I publicize a "request address" with the intention of allowing people to support my online efforts, am I risking my privacy? i.e. if many people send me Bitcoin via that address, ostensibly that ...
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1answer
42 views

How can we know our “from” address in advance?

This website ask me to enter the address FROM where I would be sending BTCs. But every time a send some BTC it seems to be sent out from a different address... Should I use the one I always see when I ...
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1answer
100 views

Address reuse for business

The consensus is that address reuse is bad and should not be done. Bitcoin wiki even argues it hurts yourself and those who will own the bitcoins after you. However, unless I am mistaken, most ...
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0answers
73 views

Managing the bitcoin address gap

We're in the process of setting up bitcoin payments to fund accounts in our system. Using the C# BitcoinLib (https://github.com/GeorgeKimionis/BitcoinLib) to interact with the Bitcoin Daemon. Our ...
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2answers
2k views

How to make permanent Bitcoin Address for donations?

I want to add a Donate Bitcoin button to my website(s). I want to create a Bitcoin wallet with a permanent address for receiving donations. How would I do this?
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2answers
431 views

Why does this transaction use the same address for multiple inputs?

Why does this transaction include the same address multiple times? Was this done to "hide" the two other addresses where funds originated?
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1answer
74 views

I received multiple transactions at one address, but may have screwed up wallet. Not sure what my options are.

Some years ago, as an experiment, I took part in a mining pool and received a number of Bitcoin payouts, all to the same address. Then I stopped mining. I didn't spend any of the balance I had accrued....
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1answer
154 views

If the sender address is known is it possible to find the recipient address?

Let's say I give someone an address to send me some bitcoins, when I eventually use these bitcoins to send to someone else can the person that has my address somehow know the address of the person I ...
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2answers
5k views

Why do wallets use multiple private keys instead of one each?

I am learning about Bitcoin and when I was about to export my private key from a single electrum wallet, I found that there were in fact a lot more than one. Why is that so, don't you only need 1 ...
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1answer
2k views

Static receive address instead of dynamic?

I have 2 BTC QT wallets (and 1 LTC QT wallet), and am looking for a generic receive address for my wallets. In Electrum, Mist/Ethereum and Rippex, I get a single unique address to receive. In the QT ...
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1answer
4k views

I accidentally sent bitcoins twice to the same address

Accidentally, I have transfered BTC from my one wallet to another twice on the same address. First transaction was successful, but in the second case the BTC got deducted from one of my wallet but not ...
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2answers
106 views

Wrong address used

What happens if the coins are sent to the wrong address? The address I used in error was wrong and when I contacted the site it said that they only used addresses once. Since the address was ...
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1answer
569 views

Why do transactions send coins to the same address as they spent it from?

I often notice transactions such as: 364efe5a906de5971e242f9711008e58a5ab79f136a8044b66615e8662d35f09 Where funds from the address 3PU with 1.38 BTC are split to itself (1.35 BTC) and 37Ek (0....
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2answers
80 views

Can we design the protocol, so that an address can only be used once as an output in a transaction?

Most users reuse their addresses for deposits (ie. they receive money more than once on a given address). Can the protocol be designed in such a way that an address can be used only once as an output ...
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2answers
371 views

Why wipe all BTC from an imported address?

I've read a couple blog entries and tutorials on how to spend BTC that are "stored" on a piece of paper. They all suggested importing the private key into e.g. blockchain.info's wallet (or any ...
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1answer
469 views

How or why “a Bitcoin address is a single-use token”?

In the address wiki page it says that "a Bitcoin address is a single-use token". Do I have to understand one address is (or should be) used only once? More over, the Address reuse page seems to ...
6
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1answer
376 views

Tainting with HD wallets

I'm having trouble understanding HD wallet privacy... for one thing, what if I want to send more money than I have in any of my individual derived addresses? Then I would have to use more than one, ...
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2answers
4k views

Sending from same address multiple times VS receiving to the same address multiple times

Is it completely safe to have multiple transactions sent to the same address? I have read that "using" the same address multiple times could be unwise. Does this refer to "sending from" or "receiving" ...
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2answers
230 views

How does not practicing address reuse hurt my privacy?

If I never conduct transactions from an IP address associated with my real life identity and never conduct a transaction with someone who knows me in real life how can using the same address all the ...
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3answers
3k views

Can I receive Bitcoin on any of my wallet addresses?

Can I receive Bitcoin to any addresses from my wallet? I have more than one address on Coinbase, and it seems to change every day. Can I turn off the changing of addresses?
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1answer
315 views

Does address-reuse make Bitcoin private keys vulnerable to quantum computing?

Though quantum computing can technically break ECDSA with enough qubits, this has not the greatest implication on btc because public keys are not known as they are protected by the hashing used to ...
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1answer
382 views

How do Reusable Payment Codes work?

I've recently heard about "Reusable Payment Codes" (BIP 47), and it sounds like a great feature, except that I couldn't find a simple explanation of how they work. Can anybody explain them please?
3
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1answer
340 views

Why new public key for every new request?

I created Bitcoin accounts using different clients but all clients I tried prompt for new public key for each request. My question is shouldn't be the public key one's identity which one should be ...
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3answers
769 views

Receiving donation on a bitcoin address and security issues of reusing the same address

I am running a blog and would like to receive donations from my followers. So I thought to add a bitcoin address on my "Support me"-page! But on bitcoin.it, it is recommended to never reuse addresses,...
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0answers
119 views

How to get BitPay to process each settlement using a new address?

Since receiving multiple payments using the same address isn't safe, is there a way to get BitPay to settle the balance using a new address each time? It wouldn't be feasible for the user to log in ...
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1answer
862 views

Does it hurt the network to reuse addresses?

There is already a question that ask why you shouldn't reuse addresses, but it's about whether or not it's a bad idea for the person who would do the reusing. I understand there are several reasons ...
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3answers
8k views

Is it safe to reuse a Bitcoin address?

Besides the obvious privacy implications, and (according to a bitcointalk.org forum post) the fact that once an address is used your coins that rest on it safety depend entirely on the ECDSA safety (...
9
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1answer
2k views

Should I use a different address for every transaction?

Should I use a different address for every transaction? If yes, why? For safety? What happens I use the same address to get bitcoins from 2 different people, what happens?