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Questions tagged [address]

This tag should be used for Bitcoin addresses. A Bitcoin address is an encoding of the hash of an ECDSA public key or a script. Knowledge of this value allows a user to send Bitcoins to another person over the network. Bitcoin addresses begin with a '1', '3', or 'bc1'. Not to be confused with mailing addresses or IP addresses.

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2answers
597 views

What are the advantages of using Secp256k1?

Bitcoin uses secp256k1 as the specification for it's address system (https://en.bitcoin.it/wiki/Secp256k1). What are the advantages (and disadvantages) of using this over other specifications such as ...
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4answers
671 views

What if I create a new address and I'm given one which clashes (already exists, it is being used by other user)

Addresses are like GUIDs, no? They are created randomly whenever you request the creation of a new address. But what if when creating one, it clashes with one already created? I know that the ...
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2answers
2k views

How does blockchain.info associate a message with an address? [duplicate]

I randomly encountered this address on blockchain.info: https://blockchain.info/address/1CzpppydnGN5dQN7iBnZbmm5RXreu7hrHW and at the top a message appears presumably describing the owner of the ...
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6answers
2k views

If I were to generate an address and it happens to collide, legally speaking, would a transfer constitute theft?

Let's say that somehow I generate a new address which happens to already be "taken". I realize the chances of address collision are extraordinarily low as per Is it possible to brute force bitcoin ...
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2answers
1k views

Where is the public key corresponding to my address stored?

Some simplified explanations of Bitcoin say, that the Bitcoin address is the public key, and anybody can easily verify that a signed transaction is valid since it was signed with corresponding private ...
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2answers
3k views

Donation wallet address

I read that wallet/account is not the same as bitcoin address. The address can be used only for single transaction. How do you receive donations on your address? Are wallet addresses unique for the ...
4
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1answer
2k views

Delete all wallet addresses

How can I delete all addresses from my Qt wallet without having to download the blockchain all over again from the scratch? I would like to find a bulk way to do it as there are a few thousand ...
4
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1answer
228 views

How do I determine the balance of an address I don't own? (WebAPI or local API)

I have an arbitrary address. How can I get the current balance of the account through a Web API? ... how do I get it for a local API? I'm also interested in all transaction history for that address. ...
4
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1answer
965 views

Why does Bitcoin-Qt use hidden private addresses?

As I found out from this question default wallet contains 100 private keys but only makes one visible. But what I don't understand is why Bitcoin using those "hidden" addresses? I've been using my ...
4
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2answers
764 views

Is there a point to vanity addresses if a new destination address should be created per sender?

There is some advice for merchants to have a unique Bitcoin address for each incoming address. Apparently this will help associate a transaction with a sender. Since it can take a long time to ...
4
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1answer
674 views

Can I have multiple working public keys per wallet?

My Android Bitcoin wallet changes the Public key (the one I give to others) after every transaction for security. However, I want to put up a Public key online for donations. Does this mean that my ...
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2answers
7k views

How do you delete an account in Bitcoin Core?

I am attempting to allow multiple bitcoin addresses to be created per account, but how can I delete them using the standard API? There doesn't seem to be a function for that. E.g. the acccount "Test" ...
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2answers
1k views

How to get the Input Address from vin where only a txid is given (Insight-Api)

I like to find the Input Address and Amount for a vin like this: "vin": [ { "txid": "e3f0e88ce224d342a0189c1b9d2fd488d8bda2f303dbe1e1dbbaa5f51d9f4a53", "vout": 1, "...
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2answers
3k views

What is the difference between deleting a private key and deleting an address?

On Blockchain.info, when deleting private keys from your wallet, it asks if you want to delete only the private key or if you want to delete both the private key and the address. If you choose to ...
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4answers
951 views

Is anyone developing a DNS-like system for Bitcoin addresses?

It seems like mainstream access would be easier if there was a more human readable system for bitcoin addresses. No one has to remember IP addresses, we have servers with databases for that. What ...
4
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1answer
90 views

Bitcoin Address Wiki Issue

I'm having issues following through the technical wiki here - https://en.bitcoin.it/wiki/Technical_background_of_Bitcoin_addresses Point 2 says to perform a SHA256 hash on the public key, which I'm ...
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2answers
6k views

How long does it take for an exchange to send me bitcoins?

I'm not sure I understand all of the bitcoin storage options I know there are bitcoin addresses and bitcoin wallets what is the relationship of an address to a wallet? is a wallet mandatory and a ...
4
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1answer
727 views

How to make a vanity throwaway address? Similar to 1BitcoinEaterAddressDontSendf59kuE [duplicate]

I want to write data to the Blockchain, and write to specific addresses. I want to send small amounts of Bitcoin to addresses like this: 1MikesReallyCoolApp<game_id_here>59kuE How can I do ...
4
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3answers
474 views

How the hell was I able to receive BTCs via an address I do not own?

A few minutes ago I received 0.00000001 BTC. I don't know who sent them or why. But what makes it crazy is, this sum was sent to an address I do not own and which the client I'm running (the standard ...
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2answers
1k views

multiple outputs, address forking

i did read up some stuff about bitcoin but never used it until today. i might be asking something very obvious, but how can i get rid of address forking? that is, after several transactions my address ...
4
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2answers
594 views

Does the satoshi client always send the change of a transaction to a newely generated address?

Experimentally, this seems to be the case, but is it always like this or depends on some details? Also, does it generate a new address each time this is done, or first searches the wallet if there is ...
4
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1answer
402 views

What are the transactions included in the merkle root

I am trying to understand the block hashing algorithm used to generate block. One of the points mentioned here is it is (nearly) impossible for two people to have the same Merkle root because the ...
4
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1answer
291 views

Why does it take a different time to generate a different pattern of the same length in vanitygen?

I've been looking at generating some vanity addresses today, and I found it surprising that the program generating the address predicts that it will take a different amount of tries to compute a ...
4
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1answer
2k views

How to create a Bech32 address from a public key?

What are the steps to create a Bech32 address from an ECDSA public key? Bitcoin wiki has a nice step-by-step guide to create an address from a public key but what about Bech32 addresses? I've read ...
4
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1answer
1k views

How are transactions from incoming blocks verified?

Since only the hash of public keys are stored on the chain (as address), which could be validated only by miner who have access to signed transactions (which includes public key), how do other ...
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2answers
762 views

Bitcoin how to get X value from Y

How to get X value from Y? ECDSA x,y coordinate validity verification doesn't seem to work X = 0x79be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798 Python code, p = ...
4
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1answer
219 views

Send coins from another adress

Newbie here! I need to confirm something: I have bought bitcoins and I already see them in the QT client I am using. I now want to send the bitcoins using a different address than the one I use to ...
4
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1answer
173 views

How to implement a green address in Bitcoind?

There are a few websites that use green addresses, but how can one go about implementing it using the standard Bitcoin API?
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2answers
3k views

Is there an Android app that will scan a QR code and show the balance?

What I'm looking for is an app that lets a person scan a QR code containing a Bitcoin address and then see the balance and transaction history for that address. For a specific use case, a mobile ...
4
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1answer
598 views

I know my address but can't remember which site it's from

I signed up for a bunch of different wallets because I didn't know which one was the best. I have 2.5 bit coins in a wallet that I don't know how to get. I know my wallet address, but can't remember ...
4
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2answers
227 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 ...
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3answers
140 views

What if you wanted to decrease anonymity?

My idea is to be able to build "credit" for an individual. Lenders of BTC could just use a service to check the "credit score" of a certain address of a borrower. The borrower would have to spend a ...
4
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1answer
173 views

How do I get a vanity address from a hierarchal deterministic wallet?

I'm interested in finding different techniques that can be used to create vanity addresses with a BIP32 address. For example, can any of this computation be offloaded to a dedicated server, or a 3rd ...
4
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1answer
470 views

Where is the bitcoin automatic address generation?

I have head of the automatic bitcoin address generation feature for every transaction. I have done multiple transaction, but I still have the same addresses (I have two addresses). I would like to ...
4
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1answer
2k views

How balances are calculated?

Is it the case that the blockchain has information on the balance associated with each public key-address, such that the client on my PC, say, will look at every public/private keys pair in wallet.dat,...
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2answers
275 views

Command line address calculator?

I'm looking for a command line address calculator, where I can put in my private exponent and get out a bitcoin address in Base-58 encode. Does anyone know some free software that will allow me to do ...
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3answers
157 views

Are generated public/private keypair the most random possible?

The number of possible Bitcoin private/public keypair is very strong (2^160 which is 1,461501637×10⁴⁸). However, if the random generator is not good enough, only a subset of all that "space" could be ...
4
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1answer
427 views

What are the weakest cryptographic guarantees in Bitcoin?

I read in this Github pull that Bitcoin relies on weaker cryptographic guarantees than SHA256. What are the weaker cryptographic guarantees being referred to? Could it be that RipeMD is 160 bits? ......
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2answers
407 views

Decentralized democratic voting [duplicate]

Has the fundamental problem in cryptovoting, one person, one vote, in a completely decentralized or blockchain centric manner been solved? In other words, how can votes be allocated in a ...
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4answers
720 views

Coins sent to unknown address in Multibit

Premise: I'm quite new to all this bitcoin thing. After experiencing some problem with a bitcoin transaction, I made few attempts with small quantities (0,0001). In particular, I've sent 0,0001 to ...
3
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2answers
476 views

How safe is bitcoin with regard to a random address generation attack? [duplicate]

Imagine an attacker implementing something like the following pseudocode on the fastest ASIC farm money can buy: attack(blockchain, my_address) addresses = generate_tree_of_all_nonempty_addresses(...
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1answer
4k views

What is the maximum of receive addresses the default wallet can handle?

I guess there is no limit. But on tests, what is the maximum before the bitcoind start to slow down in a specific machine?
3
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1answer
4k views

How to retrieve all addresses with non-zero balance and their balances?

I'm looking for a way to retrieve all address balances of addresses with a non-zero balance in the blockchain. Is there a software tool that can calculate the balances in an accessible format? Or ...
3
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2answers
8k views

Should you protect your Bitcoin address like your credit card number?

Today, I recieved this scam email: We have reached the biggest milestone in our history – over a million wallets. https://[removed] will celebrate with some big prizes. In October 2013, ...
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3answers
3k views

createrawtransaction, multiple outputs, single input?

following the manual on https://bitcointalk.org/index.php?topic=101525.0 , i would like to merge multiple fractions of BTC from multiple addresses i own, to another single address i own(reassemble, ...
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2answers
845 views

Using a new address for every transaction?

I've been reading the Developer Guide, and they seem to be really strong on the idea of using new addresses for every transaction. I understand the reasoning - anonymity - but I don't really ...
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3answers
1k views

How do I know my wallet.dat actually already contains 100+ addresses ready to be used?

I'm using the standard commandline client (under OSX, in case this matters). I've read in some threads that it is smart enough to pregenerate 100+ addresses to be used in future when you ask them, so ...
3
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1answer
237 views

Can you detect that the addresses generated by an HD wallet came from a single wallet?

Can someone who is looking at the blockchain detect that 2 or more addresses generated by a single HD wallet are actually generated by that single seed/HD wallet ? Can someone who does know that 2 or ...
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5answers
396 views

As a small hotel accepting bitcoins, do I show only one payment address?

I am currently accepting bitcoins as payment at my hotel, but I am uncertain about the payment address(es). I prefer to avoid payment service such as BitPay and Coinbase to mention a few. At this ...
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2answers
7k views

Bitcoin address does not show transaction/balance from Coinbase purchase

I purchased a bitcoin using a Coinbase account. When I try to verify that transaction to the address, I can't see any activity or balance for the bitcoin address that Coinbase shows as mine. Coinbase, ...