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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3
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2answers
67 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 = ...
0
votes
1answer
31 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 ...
0
votes
0answers
13 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 ...
0
votes
1answer
22 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 ...
0
votes
0answers
22 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
vote
1answer
45 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 ...
-1
votes
1answer
62 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.
1
vote
3answers
100 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
votes
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.
1
vote
1answer
148 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 ...
1
vote
1answer
24 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
vote
1answer
53 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?
1
vote
2answers
40 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
28 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
61 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 ...
1
vote
0answers
33 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
55 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 ...
1
vote
1answer
31 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
213 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
34 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
364 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 ...
0
votes
0answers
44 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
vote
2answers
61 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
33 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 ...
1
vote
2answers
50 views

Bitcoin purchases by country

I'm interested in getting data on bitcoin adoption by country. Is there a way of mapping bitcoin addresses to countries of origination?
0
votes
1answer
132 views

How is a NXT account address generated? Why do we need to send out a transaction in NXT to secure the address?

I'm setting up an account and noticed: The recipient account is an unknown account, meaning it has never had an incoming or outgoing transaction. To submit this request you must supply the recipient ...
1
vote
1answer
23 views

Practical interpersonal address exchange

How can addresses be exchanged practically & efficiently between two users? Visually copying & keying them is impractical & faulty.
0
votes
0answers
31 views

Deterministic Key Generation: prove that address is in a sequence of your original seed

Lets say that someone wanted to prove they owned some metadata without revealing who they were. For instance, lets say they needed to prove they had owned a contract but that contract was in an ...
0
votes
2answers
23 views

Convert an lower-cased address to a properly capitalized address?

Is it possible to take a lower-cased address like 1dice8emzmqkvrge4qc9buff9px3xaydp and convert it to the properly capitalized address of 1dice8EMZmqKvrGE4Qc9bUFf9PX3xaYDp ? I've looked around and ...
0
votes
1answer
33 views

multiple parties to sign a transaction before being broadcast (or after, but either way be associated with)

Lets say someone was writing a transaction solely to denote the existence of something, or a timestamp, or writing something in OP_RETURN Could that transaction be signed by other addresses, kind of ...
-1
votes
1answer
119 views

What is a bitcoin wallet?

I do not understand how addresses and wallets are related. I see that you are advised to generate an address for every transaction and, furthermore, use (multi-in multi-out) tumblers to maintain ...
2
votes
0answers
37 views

Key Pools and best practices

I'm wondering about what the best practices are around generating and maintaining key pools for a wallet. What is the maximum number of keys/addresses that can be created for a single wallet? ...
0
votes
2answers
78 views

What is bitcoin ID?

An answer on this page says that neither bitcoins nor satoshis have any identity. I then read that You may consider a bitcoin to be "less-anonymous" when an attacker could feasibly find the ...
-1
votes
2answers
47 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 ...
0
votes
0answers
32 views

Is there an API that provides this functionality?

Sorry I couldn't make my title more descriptive, but it might be a little long winded. What I need is the following, and preferably an API that can support the popular crypto currencies, not just ...
2
votes
1answer
72 views

NXT single address per user vs bitcoin single address per transaction

In bitcoin, the anonymity is ensured by creating a new address for each transaction and by associating this address with a wallet. As far as I understand, with NXT, you use your account (calculated by ...
1
vote
1answer
29 views

Colored coin with stealth addresses

Is it possible to use colored coins with stealth addresses? My main consideration being that coloring a unit of cryptocurrency requires being able to keep track of its exact location at all times ...
1
vote
0answers
56 views

How to get bitcoin address from the pubkey_hash using bitcoin-abe or something else?

I'm using: https://github.com/bitcoin-abe/bitcoin-abe to import the blockchain into a mysql DB it is almost done after 5 days. So I started looking at the data and didn't see any addresses. I know the ...
1
vote
1answer
48 views

Compressed keys default for brainwallet?

I'm somewhat confused re compressed addresses... Assuming I were to make a brainwallet using "correct horse battery staple" as my passphrase gives 1JwSSubhmg6iPtRjtyqhUYYH7bZg3Lfy1T (uncompressed ...
0
votes
1answer
55 views

Can you help me fix this address?

I just got this address: 1a8LDh3qtCdMSAgRXzMr4zB8w1EG4h1Xi, but the checksum doesn't validate. Can someone help me fix it by changing some characters that look/sound similar?
1
vote
1answer
116 views

Bash BTC and LTC address generator

Do you know any bash script or C simple program to generate btc and ltc addresses? I need to generate address while in recovery mode on osx or on a linux onthefly. But I cannot find such a thing on ...
2
votes
2answers
86 views

Is it possible to check if a bitcoin address “belongs to” a master public key from a deterministic wallet?

Let's say I have a Master Public Key (MPK) and have a derived some addresses from it. How can I check later if a given address was derived from my MPK?
2
votes
1answer
72 views

Advanced Bitcoin Transactions

Let's say that 7 users want to spend money from a Bitcoin multisig address. The approval of funds from this address requires the signatures of A (the leader), either B or C (two managers), and 2 of 4 ...
2
votes
1answer
27 views

On multibit how do I update my sending address? [closed]

I have bitcoin in my transactions but it does not appear in my wallet. It says updates stopped
2
votes
1answer
73 views

Why is it possible to have multiples addresses in an output of a transaction?

I am trying to load the blockchain into a MySQL database by using the data gathered from RPC calls to bitcoind. I am wondering why the "addresses" key within the "vout" array of a transaction is ...
1
vote
1answer
13 views

Bitcoin wiki docs, account or address?

listtransactions [account] [count=10] [from=0] Returns up to [count] most recent transactions skipping the first [from] transactions for account [account]. If [account] not provided it'll ...
1
vote
1answer
89 views

Is it safe to send to my own address from my wallet?

I have a wallet.dat which has so many addresses in it. Like 1, 2, 3, 4, ....., 1234324234 addresses. (Each number is address) I backed up original wallet.dat, and I want to use this light wallet.dat ...
4
votes
2answers
125 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 ...
2
votes
1answer
66 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, ...
1
vote
1answer
23 views

How to distinguish addresses currencies apart on php [closed]

I need depending on the address to assign a value of the transaction. Both at the level of php distinguish btc ltc from ppc?