Bitcoin Stack Exchange
Bitcoin Stack Exchange

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.

84 questions
23
votes
3 answers

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 (as opposed to your coins being secure if at least…
Felipe
  • 1,688
  • 3
  • 19
  • 31
15
votes
4 answers

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 it is imprudent to do so?
Murch
  • 71,155
  • 33
  • 180
  • 600
9
votes
1 answer

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?
Klajdi
  • 91
  • 1
  • 2
8
votes
2 answers

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 addresses are 'free'. But this isn't the case for say, a…
Abhishek Divekar
  • 191
  • 6
8
votes
2 answers

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…
ffxsam
  • 185
  • 5
7
votes
3 answers

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, which is supported by citing not only Privacy…
MagTun
  • 185
  • 4
7
votes
1 answer

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 you'd want to avoid reusing (e.g., fear that ECDSA…
Daniel H
  • 674
  • 3
  • 15
6
votes
1 answer

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, right? Which would compromise privacy, because it…
Elliot Gorokhovsky
  • 239
  • 1
  • 3
6
votes
3 answers

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?
Mohammed Ahmed
  • 61
  • 1
  • 3
5
votes
1 answer

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 transaction, where I now receive 8 BTC change as a…
Simon O'Hanlon
  • 155
  • 4
5
votes
2 answers

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 private key to hold all bitcoins and manage them?
Dedados
  • 153
  • 1
  • 5
5
votes
2 answers

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 time (for the sake of simplicity) hurt my privacy?
Pablo
  • 382
  • 1
  • 8
4
votes
1 answer

What information can an attacker gain from watching the users behavior in block chain?

Given the blockchain is a public ledger, if user chooses not not change their public key (address) every time they make a transaction, what information can an attacker gain from watching the users behavior?
Erick LAW
  • 41
  • 1
4
votes
2 answers

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 to the old label for some reason? Does anyone…
Eliot
  • 41
  • 1
4
votes
2 answers

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 bitcoins to cold storage, as long-term savings. (the…
Em Edih
  • 41
  • 1
1
2 3 4 5 6