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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1answer
42 views

Android Bitcoin Wallet freshly installed, two addresses. Why two?

First off, I am rather new to Bitcoins — will be obvious after I asked my question I guess. I have read some theory about it, like it's a distributed crypto-currency based on the Bit Torrent protocol, ...
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0answers
5 views

Transfer to Bitcoin core address without sychronizing first [duplicate]

I installed Bitcoin core but its not fully synchronized right now. I think i make a mistake. I transfer my bitcoin to address that show in my bitcoin core I install in my desktop without sync data ...
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2answers
19 views

Why is pycoin getting the incorrect output address?

I am using pycoin version 0.52 from pypi and it is getting the wrong output address from a transaction. Code # testnet txid and corresponding rawtx # see ...
2
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3answers
215 views

How can I test if a bitcoin address is compressed or not?

I have two bitcoin addresses: 1D8VSXHFAWNhAbruwUMbNp4hsXAnRNkYvX 12T15tvMGaymMX97X9KxVzyLF323r8v6Hg One is compressed, one is not. How can I test which is which? (Preferably using python 2.7) ...
1
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0answers
17 views

Single address wallets - no change addresses [duplicate]

Is it legal for Bitcoin transaction to spend output back to one of the input addresses? Namely, to create a single address wallet (paper wallet), so that change addresses do not need to be generated. ...
0
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0answers
25 views

Online wallet for betting / customer profile?

I am looking for a system that provides users with the option to deposit and withdraw BTC to a generated address. Basically something that works like https://primedice.com/play and ...
3
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2answers
74 views

What are the minimum and maximum lengths of a Mainnet Bitcoin address?

I'm getting mixed answers on this question. For example, this source says addresses vary between 27 and 34 characters in length. The Wiki says 26-35 characters. Neither source cites something that ...
2
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4answers
167 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 ...
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1answer
37 views

Reuse of addresses by a service (“get new address” returning *funded* addresses)

Recently, a marketplace was said to have been reusing deposit addresses, such that clicking the "get new address" button would immediately give the user a different address, however, the "new address" ...
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1answer
31 views

Is there A Mechanism In Place that Prevent Address 'Squatting'? [duplicate]

Is there a function or mechanism in the bitcoin protocol that prevents someone from creating millions or billions of bitcoin addresses and just sitting on them? Do the addresses need a minimum balance ...
1
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1answer
47 views

Check if a user pays another user for bitcoin website

I am creating a bitcoin website. I would rather the bitcoin didn't go through my website to prevent any security issues. What happens is one user pays another user, and when that happens my website ...
0
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2answers
61 views

Sending bitcoins to an un-owned, well-formed wallet

This is a follow-up question to: What happens if I mistype the address when making a payment?. Scenario: You're trying to send bitcoins to an address. You type in the wrong address, but the address ...
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1answer
72 views

How can one Bitcoin address be associated with mulitple IP addresses?

I'm new to Bitcoin and I'm having trouble understanding the concept of "address". I understand that an address is created when you want to send or receive bitcoins from someone. You create a bitcoin ...
0
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1answer
56 views

Why can I only see the balance of my wallet and not the one of each of my receiving addresses? (Multibit)

I have some troubles to understand the logic behing addresses and wallets. I use Multibit to manage my BTC. I have one wallet with 5 receiving addresses. I have transfered from an exchange website ...
0
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1answer
47 views

BIP32 child derivation from another child

I have a bit of conceptual problem here, Let's say I have a BIP32 implementation. If I derive two subkeys (1/2/1/2) and (1/2). is it possible to derive (1/2/1/2) from (1/2) with a subkey of (1/2)? I ...
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2answers
55 views

Sending from address to address in bitcoind

I'm programming the back-end for an ecommerce solution, Bitcoind API gives me one way of sending money to a bitcoin address: sendfrom <fromaccount> <tobitcoinaddress> <amount> If I ...
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2answers
45 views

Are there Bitcoin addresses with an odd number of transactions?

When I explore the blockchain on blockchain.info, all Bitcoin addresses seem to have an even number of transactions, e.g. 16Zugc8aq9sPkxBYXyYGqJHTizRzT5wTQg has 16 transactions. I have looked at a lot ...
4
votes
1answer
90 views

Correct Citation Format for a Bitcoin Transaction

When writing an academic style paper where specific bitcoin transactions are used as examples, is there a standard format to "cite" a bitcoin transaction? If not, what do you think an appropriate ...
0
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1answer
59 views

What roles of WIF(Wallet Import Format)?

I am reading "Mastering Bitcoin" written by Andreas and I found this explanation about "WIF(Wallet Import Format)" Key Formats Both private and public keys can be represented in a number of ...
2
votes
2answers
101 views

How do you send to multiple addresses by paying a one time fee? Which wallet supports this?

I have 20+ addresses I need to payout to. How can I send to all of these addresses without having to do it one at a time and paying a fee for each? Which desktop and mobile wallet supports this type ...
1
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1answer
78 views

How to tell whether an address is local or remote?

For example, I have a BTC address. Can I (using RPC) get information is this address my local or remote?
0
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1answer
81 views

Generate address with RSA private key

Can I generate a bitcoin address with my RSA private key? Explain also how and why.
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1answer
155 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" ...
0
votes
1answer
80 views

How to get a wallet address and set label via RPC?

I'm familiar with the basic RPC commands, but I'm having trouble retrieving/adding an address to a wallet, using purely RPC calls (i.e. bitcoind only, not bitcoin-qt). My understanding is that ...
0
votes
1answer
39 views

Do all transactions have at least one output that contains at least one bitcoin address

Do all transactions that are included in a valid block have to have at least one bitcoin address as part of their outputs (vout)? I found this to be similar: Are Bitcoin transactions permitted to ...
4
votes
1answer
67 views

Does Litecoin have a higher chance of address collision than Bitcoin?

I assume Litecoin has different rules of generating addresses with Bitcoin, since all Litecoin addresses are 34-characters long which is different than Bitcoin. Given that the rules for generating ...
3
votes
2answers
153 views

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

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

Is there a way to figure out when an address is created?

I'm doing some bitcoin address collections. If there are some meaningful letters in the address or if the address is created in a meaningful time to me, I will buy it. How can I know when the ...
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0answers
27 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 ...
1
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1answer
27 views

Funds and Wallets

If I load bitcoins to my wallet and the funds are there, and I go back to load more Bitcoins with a new address for my wallet are the funds from my first wallet going to merge with the newly added ...
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0answers
27 views

How do I make a new address in Bitcoin-Qt?

I have downloaded Bitcoin-Qt from bitcoin.org, but the version is experimental. I want a full version of Bitcoin. Also, I cant make a new address using the "Receive" tab; there is no detail in the ...
1
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1answer
135 views

Sending bitcoins to same address

I am using the BitcoinJ API to create my wallet. When I create a transaction, I provide the change address to which change should be sent. For example: let there be 1 bitcoin at address A; then I ...
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votes
1answer
87 views

Bitcoin 101, need some knowledge [closed]

I am new to bitcoin. How do I check if my blockchain is working? I have tested some free bitcoin sites but neither of them have worked.
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3answers
193 views

ECDSA x,y coordinate validity verification doesn't seem to work

The ECDSA algorithm, secp256k1 for Bitcoin allegedly uses the equation y ^ 2 = x ^ 3 + 7 mod P to determine the validity of an alleged point upon the elliptical curve. Utilizing ...
0
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0answers
19 views

We are running an e-commercial site. A client used an wrong address for transaction and he is asking us to finding those coins [duplicate]

We said its impossible to find those coins since he don't have the wallet; How can it be possible somebody got an wrong address with the right checksum and he does't possess the wallet.dat file.
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2answers
3k views

I can't find my bitcoin address and my bitcoin core is out of sync by 3 years

Hey guys I am a newbie at Bitcoin just recently found out about it. I downloaded Bitcoin core; I encrypted the wallet; I created a backup folder, but it is out of sync by 3 years 4 weeks and i can't ...
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1answer
27 views

Link Receiving address with other addresses

Assumed somebody knows one of my several addresses in my wallet for receiving bitcoins, can he link this address with the other addresses I got? Or does every address stand for its own?
1
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1answer
65 views

How do I prevent the standard Bitcoin client from sending some of my Bitcoins to a change address?

I found somebody that imported a paper wallet with 100BTC then used 2BTC BUT the other 98BTC were sent to a change address. Why and how can I prevent this; how can I enter a custom change address?
2
votes
2answers
157 views

How do I check the checksum of a Bitcoin address?

I'm working on a Bitcoin ATM. We want to detect addresses that are entered incorrectly. There's a checksum on Bitcoin addresses - but how can we check it?
0
votes
1answer
32 views

How do addresses that refer to a web site work? [duplicate]

Some bitcoin addresses on blockchain.info refer to an external website, see e.g. here: https://blockchain.info/tx/40c09e1fb345d258b8123c5e6ceda3d53575def3053c87bf7d5571c74fc2227d One of the ...
0
votes
1answer
200 views

java.lang.NoClassDefFoundError: org/spongycastle/util/encoders/Hex in Java when dealing with Bitcoin addresses

I have a private key bigInt of type bigInteger and I would like to generate the address corresponding to this private key. I implemented the following function public String get_address () { Address ...
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0answers
92 views

Generate Bitcoin addresses using a Master Key from Armory wallet

Is it possible to generate Bitcoin addresses using a Master Key from a Armory wallet with PHP? I don't want to use Electrum Master Key as Armory has a lot more features that come in handy often.
2
votes
1answer
62 views

Is it possible to specify a default change address?

Is it possible to enable default change address on my bitcoin-qt (aka bitcoin-core) client? I'm using a webservice that monitors my balance (based on public keys) and whenever I send a transaction my ...
3
votes
2answers
70 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 ...
3
votes
4answers
467 views

HD wallets and address reuse

HD wallets create a series of addresses, and then when one address has received an input it will give you a new address that hasn't received inputs yet So in the idea of you sending yourself bitcoin ...
0
votes
1answer
56 views

How can address' hash160 be used to determine information for malicious purposes? (Ie reusing of the same address)

I've been playing around with Richard Kiss's Pycoin app which is clarifying how P2PK works. I see that the hash160 of the value: (0x04) (x-coordinate) (y-coordinate) (for an uncompressed Testnet ...
6
votes
4answers
430 views

How to find a specific bitcoin address from all the addresses?

Recently, I found a site that show all the addresses in a huge list, divided in 904625697166532776746648320380374280100293470930272690489102837043110636675 pages. The site's link is ...
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0answers
47 views

Find all webpages with bitcoin addresses posted on them

I'd like to search the web for all webpages with bitcoin addresses posted on them. Thoughts on best way to do this?
1
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2answers
91 views

Getting all transactions that ever occurred for a bitcoin address

I know you can use various APIs to get the balance for a given bitcoin address, but is there a way to total all the bitcoin that were ever received at a given address? A so-called "transaction ...
2
votes
0answers
37 views

How can one prove the ownership of an address? [duplicate]

Is there a way to prove the ownership of an address without spending bitcoins? I Imagine something like signing some given data with the private key - how much would that weaken the security of the ...