Address reuse - BitcoinWiki

Why is Bitcoin Address Reuse Bad

Why is Bitcoin Address Reuse Bad submitted by parakite to Bitcoin [link] [comments]

Bitcoin Address Reuse Alternative?

I'm brand new to bitcoin, so please be gentle :) I'm trying to learn the in's and out's of it all.
I've seen it mentioned not to reuse a bitcoin address for privacy reasons. I think I understand the rationale behind this: If all of your bitcoins go to one address, then anyone can see how many you have. The alternative is to use multiple addresses (some even suggest a new address for each transaction). I'm confused about how this can help protect privacy. Imagine this scenario: 1) I receive 1 bitcoin at Address1, this is payment for building someone a fence. 2) I need to pay my rent, but if I pay from Address1, then my landlord can see how much money I have received at that address (I think - not positive on this though). He sees that I'm making all of this bitcoin building fences, and being a jerk, decides to raise my rent. This would be bad. 3) Instead, I setup another bitcoin address. Lets call this one Address2. I transfer money from Address1 to Address2, and then pay my landlord via Address2. 4) Can't my landlord backtrack transactions and see that Address2 received money from Address1?
I'm sure there is something fundamental I'm missing here. Especially the fact that I can't find anyone else bringing up this potential problem. I think I must be misunderstanding something basic about how bitcoin works.
Can someone clue me in what I'm not getting?
submitted by bitcoinnewb2017 to BitcoinBeginners [link] [comments]

Alternative to Bitcoin Address Reuse?

I'm brand new to bitcoin, so please be gentle :) I'm trying to learn the in's and out's of it all.
I've seen it mentioned not to reuse a bitcoin address for privacy reasons. I think I understand the rationale behind this: If all of your bitcoins go to one address, then anyone can see how many you have. The alternative is to use multiple addresses (some even suggest a new address for each transaction). I'm confused about how this can help protect privacy. Imagine this scenario: 1) I receive 1 bitcoin at Address1, this is payment for building someone a fence. 2) I need to pay my rent, but if I pay from Address1, then my landlord can see how much money I have received at that address (I think - not positive on this though). He sees that I'm making all of this bitcoin building fences, and being a jerk, decides to raise my rent. This would be bad. 3) Instead, I setup another bitcoin address. Lets call this one Address2. I transfer money from Address1 to Address2, and then pay my landlord via Address2. 4) Can't my landlord backtrack transactions and see that Address2 received money from Address1?
I'm sure there is something fundamental I'm missing here. Especially the fact that I can't find anyone else bringing up this potential problem. I think I must be misunderstanding something basic about how bitcoin works.
Can someone clue me in what I'm not getting?
submitted by bitcoinnewb2017 to Bitcoin [link] [comments]

A question about bitcoin address reuse

Hey guys, I've been learning as much as I can about bitcoin and one thing that I'm trying to understand is the implications of reusing your bitcoin address.
As far as I am aware, it is avoided due to privacy reasons. Having a single address means that your funds are public to anyone who discovers your address (Eg. By sending you a payment.) - this will only compromise you if you identify yourself with that address though (online payments may not require identity) - the wiki references breaking into your house hijacking and asking for ransom knowing how much money you have. So basically you could become a target and have to trust the person you do business with... Isn't this the same as going somewhere looking all flash, buying a car and becoming a target by a stranger?
I also read that it can compromise the privacy of someone else, and the only thing I can think of is if someone rotated their address, but had a recurring payment to me, then all of their addresses could be identified. But couldn't you also follow the change trail? - if you pass your change to a new address every time, you just follow the larger transactions for the most part to see where the balance is.
The main factor for my questioning is the transaction fee (optional but not really) which is pretty high right now (around £11 - £14 for a standard transaction last I checked). Adding inputs and outputs increases the size of the transaction and therefore the fee.
How many addresses do you or your wallet own/manage? What other concerns am I missing? Correct me please, I want to learn :D
submitted by tookthisusersoucant to Bitcoin [link] [comments]

A question about bitcoin address reuse /r/Bitcoin

A question about bitcoin address reuse /Bitcoin submitted by BitcoinAllBot to BitcoinAll [link] [comments]

Alternative to Bitcoin Address Reuse? /r/Bitcoin

Alternative to Bitcoin Address Reuse? /Bitcoin submitted by BitcoinAllBot to BitcoinAll [link] [comments]

Bitcoin Address Reuse Alternative? /r/BitcoinBeginners

Bitcoin Address Reuse Alternative? /BitcoinBeginners submitted by BitcoinAllBot to BitcoinAll [link] [comments]

What is Bitcoin Address Reuse?

What is Bitcoin Address Reuse? submitted by CryptoCurrencyNews to CryptoCurrency [link] [comments]

RFC: Tool for tracking and visualizing Bitcoin address reuse

RFC: Tool for tracking and visualizing Bitcoin address reuse submitted by BitcoinAllBot to BitcoinAll [link] [comments]

Address Reuse (x-post from /r/Bitcoin)

submitted by ASICmachine to CryptoCurrencyClassic [link] [comments]

Looking for secure offline wallet generation, also confused about address reuse. (x-post from /r/Bitcoin)

submitted by ASICmachine to CryptoCurrencyClassic [link] [comments]

Acceptable address reuse? (x-post from /r/Bitcoin)

submitted by ASICmachine to CryptoCurrencyClassic [link] [comments]

Am I the only one to whom the Bitcoin.com wallet (iOS) always reuses the same change address on every outgoing transaction?

submitted by 1reizu to btc [link] [comments]

Reusing the same address vulnerabilities (x-post from /r/Bitcoin)

submitted by ASICmachine to CryptoCurrencyClassic [link] [comments]

How do I deposit multiple times to a paper wallet without reusing the address? (x-post from /r/Bitcoin)

submitted by ASICmachine to CryptoCurrencyClassic [link] [comments]

What does Mycelium do with old addresses?

I really do not understand how changing address works here. So, they say that Bitcoin address reuse is a bad practice (actually an unintended one?! See here https://en.bitcoin.it/wiki/Address_reuse). So say I create a wallet and I have an Address1. Then Bob sends me some BTC to Address1. Then Alice sends me more BTC to Address1. Now, using Bitcoin as intended, how can I give back my BTC both to Alice and Bob if I am using the address for two transactions? Moreover, how can I even change address if only one transaction is "allowed" and that would be the one in which I move my money there?
I am using the wallet Mycelium. I am told (and I saw it!) that whenever there is a transaction the app creates a new wallet (all seed-related, but this is not what I'm concerned about)... and I've seen it happening! I bought some coins, and the address changed. However, I'm told that Mycelium keeps all the old addresses "active". Say I have made enough transactions to have Address1, Address2, ... Address10. Does this mean that whenever some BTC is sent to Address1, Mycelium instantly created an Address11 and moves them there? But then, when it proceeds to move Address10 money to Address11 shouldn't it create an Address12, and so on? (infinite loop). Or does it send all the money to Address10 first, and then create an Address11 with only the last transfer?
There is clearly something I am not understanding well. Help me reddit please.
submitted by SirCaesar29 to BitcoinBeginners [link] [comments]

Reusing Bitcoin Cash addresses is discouraged - but there are very legitimate use cases for reusing addresses. Here is an idea to get around the address reuse security problem.

The Bitcoin Cash addresses we usually deal with are not the actual public keys, but are hashed version of the public key.
The only time the public key is revealed is when the address is spent. After an address has been spent, one layer of obscurity is removed.
To always have the best security, never reuse addresses and we never have this problem.
However, I think of charities that want to put Bitcoin Cash addresses in their marketing. For them reusing addresses is very important. There are of course many use-cases where reusing addresses is extremely convenient.
So how can we solve this problem of the public key of an address being revealed during a transaction?
I introduce to you...."Address Aliasing"!!
You begin with a public address "A".
You link it to Address "B" (since only "A" can give permission to be linked to another address, we must reveal A's public key, making "A" less safe).
From this point on any funds sent to "A" will be spendable by "B". "A" will no longer be able to spend from "A" (that is the whole point of this excercise - A's public key is now known to everyone and it can be compromised more easily).
When it comes to spending from "A", we use "B" public key - and in the SAME transaction alias "A" to "C". Once an address' public key is known, it will be considered "compromised" and it will not be accepted in any future transaction.
Any funds sent to "A" are spendable by "C".
Again, when we want to spend from "A", we use "C"s public key and alias "A" to "D" in the same transaction.
At every step, the funds of "A" are always protected by a hashed public key.
What do you all think?
This is a solution for users/businesses that want the security of hashed public keys, but for reusable addresses. Sign me up!
submitted by mrtest001 to btc [link] [comments]

What is a crypto address? Blockchain addresses are strings of text that are used to send or receive cryptocurrency. You can copy & paste them or share them as QR codes. Also, some addresses can only be used once (Bitcoin), others can be reused (Ethereum), similar to bank account numbers.

What is a crypto address? Blockchain addresses are strings of text that are used to send or receive cryptocurrency. You can copy & paste them or share them as QR codes. Also, some addresses can only be used once (Bitcoin), others can be reused (Ethereum), similar to bank account numbers. submitted by CoinsPaid to CoinsPaid [link] [comments]

Bitcoin Donate Button With No Address Reuse

Bitcoin Donate Button With No Address Reuse submitted by Rufflenator to 3bitcoins [link] [comments]

Bitcoin Donate Button With No Address Reuse

Bitcoin Donate Button With No Address Reuse submitted by ososru to Bitcoin4free [link] [comments]

06-10 09:43 - '[quote]Where my coins go you can follow. / Sounds like you might be engaging in address reuse.... ?! / ​ / If you are, then you shouldn't use bitcoin that way (it compromises your privacy).' by /u/davewantsmoore removed from /r/Bitcoin within 82-92min

'''
Unfortunately not all Bitcoins are the same in a sense. Bitcoin is basically a giant open public ledger. Where my coins go you can follow.
Sounds like you might be engaging in address reuse.... ?!

If you are, then you shouldn't use bitcoin that way (it compromises your privacy).
'''
Context Link
Go1dfish undelete link
unreddit undelete link
Author: davewantsmoore
submitted by removalbot to removalbot [link] [comments]

"If ECDSA is broken, Bitcoin can remain reasonably secure if you don't reuse addresses." Is this true?

If this is actually true, what makes it true?
That post is pretty old. Has anything significant changed? What's the recommended best practice these days if you need to reuse an address? For example you are a business and need to have a single address that can be published and it wouldn't be practical to keep constantly changing it?
Is this also actually true: "(That is, an address's sent transactions might not actually be meaningful, related to its receipts, or even made by the person who receives money at that address.) "? If so, why would that be the case? It sounds like the OP is suggesting an address can somehow "send" bitcoins that it never "received" - how can that be?
submitted by nonestdicula to Bitcoin [link] [comments]

Bitcoin Mass Address Generator - July 2018 Bitcoin Q&A: Public keys vs. addresses Bitcoin Vanity Address Bitcoin Donate Button With No Address Reuse Bitcoin Q&A: Re-using addresses - YouTube

Address Reuse. Close. 4. Posted by 8 hours ago. Address Reuse . Thinking about hedging into a BTC position with multiple purchases, am I better off using a single receiving address or a new address for each transaction? 4 comments. share. save. hide. report. 100% Upvoted. Log in or sign up to leave a comment Log In Sign Up. Sort by. best. View discussions in 1 other community. level 1. 3 ... Address reuse is considered to be an accidental "feature" that isn't really supported by the developers. There are several proposals for different address types that offer additional features or security but are incompatible with address reuse. So it's best to get used to not reusing addresses now. However, there are some rare cases where it's currently far more convenient to use a few ... Why address reuse is discouraged: Reduced security An unused address is protected by ECDSA AND several SHA-256 and RIPEMD-160 operations, but only ECDSA after being used because the public key must be revealed during spending. This has been shown to open up several possible attacks in the past.[1] Reduced privacy All participants who you give the address to know it is yours obviously. Address reuse is discouraged for multiple reasons. The one that is most apparent is that it is bad for your privacy (and the privacy of others). Since every transaction is recorded publicly on the blockchain, using the same address for your transactions will reveal how much bitcoin you have, who you are transacting with, and more. This is especially problematic if this bitcoin address can be ... Bitcoin; Insights; Here’s what a Bitcoin address does (and why you definitely shouldn’t reuse it) Addresses are built to receive, not to store

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Bitcoin Mass Address Generator - July 2018

We have improved source codes for the following: 1. Mass creation of Bitcoin Address Generator and confirmed test results. 2. Complete base source code for creating Bitcoin Solution Sweeper. 3 ... He is the author of two books: “Mastering Bitcoin,” published by O’Reilly Media and considered the best technical guide to bitcoin; “The Internet of Money,” a book about why bitcoin matters. Understanding what happens if you accidentally send BCH to a BTC address or vice versa by understanding private keys and addresses. Solutions and pitfalls ar... This video is unavailable. Watch Queue Queue. Watch Queue Queue Make custom Bitcoin address compatible with Counterparty wallets CounterTools, Counterwallet, XCP Chrome Wallet and Tokenly Pockets.

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