The hash of an ECDSA key-pair's public component. Knowledge of this value allows a user to send Bitcoins to another person over the network.

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Specification of Transaction Inputs - Bitcoin vs Ripple

In Bitcoin, the transaction inputs (UTXOs) are specified as a tuple (transaction index, vout) since there is no notion of an account in the bitcoin system and the address (pointed to by vout) alone ...
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3answers
75 views

Transaction with Multiple Inputs having Same Address

Why do transactions have multiple inputs with the same address? Is it because the amounts were obtained in the address through multiple separate transactions. Shouldn't the amounts be clubbed to a ...
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2answers
61 views

How to get the bitcoin balance of a public key in C#?

How can I get the bitcoin balance of a public key in C#? E.g. for this public key: 1FqLoEpbQpMxow5bqEPpFbPVnBEbFcsg3J How can I get its balance in C#?
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38 views

Whisper Implementation in Bitcoin

Is there some kind of implementation in bitcoin to communicate between nodes, which is similar to the Whisper Communication in Ethereum ? Whisper, is a communication protocol for DApps to communicate ...
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1answer
218 views

How to get the Public Keys of a bitcoin User

Is there some way in which I could get the public key of a Bitcoin user ? Lets say I have transaction with another Bitcoin user. Is there some means by which I can retrieve the public key of the ...
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2answers
40 views

how to configure bitcoin-core (bitcoin-qt) to not use change addresses?

Can bitcoin-core wallet be configured to not use change addresses, but just one address? If yes, how? Thanks (PS: I know most people will try to convince me that this is not a good thing, but I have ...
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2answers
76 views

getting bitcoin address of blk*.dat files

I know that getting the address from the blk*.dat files is discussed a lot of times. But I don't get it why? When I have the raw scriptSig I can encode it and get the bitcoin address or not? E.g. the ...
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1answer
33 views

permanent address [closed]

How can I set a permanent address wallets to send and receive? How can I find out in advance which address the coins will be sent? We have a community in MLM that pays membership of the coins. Upon ...
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37 views

Can Ethereum support compressed secp256k1 public keys to compute Keccak addresses?

Starting from a private key, a working functional example provides details for how an Ethereum address can be calculated from an uncompressed secp256k1 elliptic curve public key. This functional ...
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2answers
46 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://...
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1answer
44 views

Generate Unique address for each users?

I have PHP Based Web Bitcoin Wallet on localhost. I use simple Login system and basic bitcoin Json-RPC. In fact, everything is runing clearly, but my Bitcoin daemon giving same Bitcoin address to all ...
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1answer
65 views

How to track bitcoin wallet activity with extended public key?

I recently signed up on blockchain.info and on the manage addresses section I can see my wallet Extended Public Key (xPub). There is a warning message saying: You should only give this Extended ...
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1answer
80 views

Bitcoin adresses seem not to be collision resistant. Please tell me I am wrong [duplicate]

I am trying to understand Bitcoin addresses, but it does not seem to be easy at all. As far as I know, a Transaction uses one or more addresses as input and one or more addresses as output. Is this ...
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2answers
57 views

Bitcoin adress security questions

I am trying to understand Bitcoin addresses, but it does not seem to be easy at all. As far as I know, a transaction uses one or more addresses as input and one or more addresses as output. Is this ...
0
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3answers
98 views

How Bitcoin handles addresses collisions?

Since the addresses are hashes of a public portion of a public/private ECDSA keypair, what would happen to two different people with different keys that hashes into the same address? How would ...
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2answers
115 views

Does the private key of Bitcoin change everytime the address changes?

I have read from many sites that an address should change every time a Bitcoin transaction is made. Does the private key change along with the Bitcoin address. How is the address obtained from the ...
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1answer
47 views

Displaying the bitcoin wallet on the internet

I was wondering, is it a security risk if you display your bitcoin wallet on the internet? Let's say my bitcoin address is 123abc. This is linked to my wallet which stores several bitcoins. It is ...
3
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3answers
133 views

How to generate bitcoin address?

I'm currently studying Bitcoin and I followed Bitcoin wiki's instructions to make an address. But my program never responds as the site above does. Supposedly, the ECDSA key ...
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1answer
45 views

When I pay, how is my balance checked, if I use different address every time?

I know there are quite similar questions, but none have addressed my issue. Let's say I use Electrum wallet, that generates addresses & keypairs from seed. So for every next transaction I use ...
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0answers
74 views

How can I add an old Bitcoin Wallet address from Bitcoin Core to MultiBit HD?

I have a wallet with Bitcoin Core. I have put that address for various sites to receive payments from them. I want to add that address to my account on my MultiBit HD program so it will just carry ...
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1answer
49 views

Can I sign a message with an Open-PGP key?

I want to prove that I control an address for asset verification. To lawyers that might not even know what a blockchain is. Signing using the private key of an address does nothing for me, as it ...
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1answer
45 views

Use several PC to generate vanity addresses

I have seven PC and I want to generate a unique Bitcoin address. On one PC the speed to generate addresses is low. How can I use vanitygen.exe on all of my computers to increase the speed of ...
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0answers
44 views

How to verify Litecoin address

In c#, I have the method that verifies Bitcoin address. Now I want to support Litecoin as well. Is it possible to adopt this method for Litecoin? Also is it possible to write generic method for all ...
2
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1answer
33 views

Where can I see the code of how the UTXO set is updated in case of a fork in Bitcoin Core?

I am looking for a filename and a line, or multiple ones if necessary. My goal is to maintain an index of addresses to UTXOs.
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0answers
54 views

How do I create an address in MultiBit?

I would like to establish an address that can receive bitcoins from viewing websites. How do I create a new address in MultiBit?
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1answer
79 views

Can one receiving address from my Wallet be linked to another from the same Wallet?

I have created a wallet using Electrum. Electrum creates 20 receiving addresses. My question is can these be linked or traced back to each other? I want to understand if I have create another wallet ...
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1answer
68 views

Anonymous Buying/Selling

If one person sold bitcoins to another person using a smartphone, will a record of the IP addresses of the devices they used be seen in the blockchain?
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Table of coin parameters

What are the P2P network magic bytes P2PKH version byte P2SH version byte Private key version byte P2P Port RPC Port Atomic units per coin (100,000,000 for bitcoin) for Bitcoin, Bitcoin testnet, ...
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2answers
154 views

Encoding my Bitcoin Address with Base58 encoding

I am trying to convert my Bitcoin Address with BitcoinJ in order to look like a normal address such as this: 1J7mdg5rbQyUHENYdx39WVWK7fsLpEoXZy. I haven't found anything exept for the Base58.encode() ...
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2answers
139 views

How can the transaction history be checked when new addresses are generated?

When a new transaction is executed via a Bitcoin-client, the sender will have a different address than the ones used in previous transactions. I also know that all the full nodes in the Bitcoin ...
3
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1answer
53 views

Derive new public keys from a public key?

This article says you can generate new public keys from an already generated public key. How is this possible? https://bitcoinmagazine.com/articles/deterministic-wallets-advantages-flaw-1385450276 ...
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4answers
146 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 ...
2
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1answer
119 views

How can I manually add a receiving address in MultiBit Classic Wallet - disconnected during confirmation

Open to any suggestions... (Original Question is below and am trying advice from the first answer) I am in the process of looking at all the deleted files on the USB disk where MultiBit resides using ...
2
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1answer
52 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
949 views

How to identify the owner of a Bitcoin address?

My father's computer was infected with a CryptoWall virus. The virus attacker asks for Bitcoins to send me an app to decrypt my our files. Is there any way to identify the Bitcoin address owner? How ...
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1answer
94 views

Can I add Bitcoins by address?

I signed up for bitcoin ages ago, but never used it; I forget who I signed up with I have had to reinstall the OS (Win 10) on my computer and lost the program I used. I do still have a copy of the ...
4
votes
1answer
96 views

How to make a vanity throwaway address? Similar to 1BitcoinEaterAddressDontSendf59kuE

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 ...
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0answers
290 views

In Multibit HD, is there a way to see all of my receiving addresses?

I understand that if I request a payment and delete the request, I still own the address and will receive Bitcoins that were sent to it. However, I find it very uncomfortable to just "assume" that I ...
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2answers
218 views

If I lose a Trezor then how does the replacement get access to the same wallet?

I am pretty confused. What I understand is that when I buy a Trezor then it gives me some words that I need to copy down. When the Trezor starts up does it then automatically create some Bitcoin ...
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1answer
89 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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0answers
34 views

Is it possible to search for an transaction to or from an address with a time period filter?

How can I search for a transaction to or from a certain address in the block chain within a particular time period? I am trying to answer if this transaction occurred on 17 Oct 2014. Hence, instead ...
2
votes
1answer
148 views

How can I get the input addresses of a transaction in Java?

I am trying to obtain the addresses of entry of a transaction when I receive money, but I have not found the way. I have tried to create an address with the bytes obtained by calling TransactionInput....
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1answer
124 views

OP_EQUALVERIFY Problem

I'm making a full-service wallet, I already made the UTXOs selection algorithm and now I want to push the transaction hex bytes. It works when I push only a transaction with only 1 input, but if I try ...
4
votes
2answers
409 views

How to create a sending address with Bitcoin Core?

I downloaded Bitcoin Core and I'm just having a look around and I can't for the life of me figure out how to create a sending address. I'm using a site to buy stuff and to register I need to "Setup ...
2
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1answer
106 views

What happens if I receive a payment after deleting the payment request

I just started with Bitcoin using Multibit HD. I clicked request payment and sent the address to someone. I then deleted the request. What happens if bitcoin is sent to this address? Will it just ...
3
votes
1answer
135 views

How do I check if an address belongs to my wallet using bitcoinJ?

I'm using bitcoinJ and I want to verify if some of the destination addresses in a transaction belongs to my wallet when I receive a amount of bitcoin. How can I verify it?
2
votes
1answer
61 views

Secret Key value for decimal versions over 127

After reviewing the address prefixes page on the wiki, I have noticed that in Bitcoin and other altcoins that the secret key / dumped private key header is always the decimal version + 128. So with a ...
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3answers
221 views

Bread wallet iOS app

I am new to bit coin and the bread wallet app, so please excuse me if this is a really obvious question. I have read a lot of information saying that it is vital to use a new address every time I ...
3
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1answer
90 views

Best method for getting bulk address information (total sent, received, and final balance)

I need to go through a large list (about 100 000) of bitcoin addresses, and, if they have a final balance, find that as well as the total sent and recieved. I am working in python, and I have looked ...
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1answer
62 views

What is the use of hashing the public key to obtain the bitcoin address?

What is the use of hashing the public key to obtain the bitcoin address (except to compress it) rather than using the public key directly? Why not deal with public keys directly?