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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2answers
82 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
420 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
519 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 ...
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2answers
1k views

Why is the ledger public?

To me, banking is not a public thing. I don't want people to know what's in my bank account at what time, or who I sent money to. I know that I can make a new address for each transaction, as ...
6
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1answer
425 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, ...
4
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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" ...
5
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2answers
244 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 ...
6
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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?
3
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1answer
443 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 ...
7
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2answers
1k views

Why is the change address for a transaction the same as the originator address?

I was under the impression that if address abc has 100 BTC assigned to it, and it pays address def 20 BTC, 80 BTC will be transferred from abc to a new address ghi. But in this transaction: https://...
2
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1answer
484 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
387 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 ...
7
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3answers
859 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 ...
7
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1answer
915 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 ...
2
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2answers
779 views

How can this input address have multiple values at the same time?

For the transaction: https://blockchain.info/tx/ee1658bb4d0de80a91d2e0005218d4cfab7c302a352458bd6afb6376b47fbf81 it looks like there are multiple inputs with different values for the same address. I ...
20
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3answers
13k 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 (...
14
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4answers
4k views

Can a Bitcoin transaction have the same address for input and output?

Can a Bitcoin transaction have the same address for input and output, i.e. spend some of the coins that are linked to an address and send the rest back to that same address? Is there some reason why ...
9
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1answer
3k 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?

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