Private keys are for signing transactions.

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1answer
18 views

CoinPunk questions with private base58 encoded private keys?

I am extemely sorry if this not the right place... but thought I could maybe get some pointers? Well, basically, if you look at this: ...
0
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0answers
14 views

Import private keys from Multibit into Armory?

I am attempting to import a private key that was made in Multibit, into Armory. I am able to restore this key into other wallets, such as the Android Bitcoin Wallet, Mycelium and Electrum, but when I ...
1
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1answer
28 views

How do I flush the keypool?

After the heartbleed vulnerability, I'm concerned that my private keys could have been compromised. I want to send all my coins to a new address with a freshly generated key. However, if I just ask ...
2
votes
2answers
19 views

Generating addresses on the fly or pre-generate and store public key?

When running a service that needed a bitcoin address, would it be better to generate a new address to use at that moment and store the private key on your server, or would it be better to pre-generate ...
1
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0answers
39 views

If I accidentally delete an address with funds

If the address is deleted (while using an online provider like CoinJar), does that mean the coins are lost for good? Or all public/private keys are still held by the company and the address deleted ...
1
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0answers
65 views

Is it possible to weaken a bitcoin private key by 'using' it elsewhere? [migrated]

What are the increased possibilities (if any) of being able to crack a private key given the following: 1) The associated bitcoin (ECDSA Secp256k1-based) public key is known. 2) The private key has ...
0
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1answer
52 views

How to import say 1million bitcoin privkeys in bitcoind / bitcoin-qt?

I was wondering if there are ways to automate / mass private key import into the bitcoin client. Anyone knows of a command or has a script or an idea to share? thanks.
1
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1answer
88 views

What happens if I delete wallet.dat?

I have this question, say I have my coins in my local wallet and 1 of 2 things can happen, say I somehow delete the wallet.dat file or some kind of malware deletes the file. I have the password ...
1
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0answers
60 views

Decentralised escrow / distributed private key generation

Issue Hi As many others i am curious in addressing distributed escrow problem (not just for bitcoin). As it stands now there are no decentralised escrows. All escrow services are based on trust in ...
0
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1answer
31 views

Import private key on multiple computers

I decided to make some custom addresses for personal use and I have two computers running bitcoin clients. I imported the private key of the wallet I generated to the wrong computer and then I ...
1
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0answers
15 views

Converting multiple btc private keys in standard text format to WIP

Ok, going crazy! I have a file that lists my old private keys (2011) (not original wallet.dat, just keys txt file). I need to convert each of these keys (not one at a time) into either a WIP key ...
1
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2answers
84 views

What if the brain wallet is just a memorable private key itself?

A brain wallet usually applies a hash function on a passphrase to derive the private key. But what if the private key itself is memorable and we just use the private key as the brain wallet? For ...
0
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1answer
40 views

What is my private key?

No computer at the moment, so I have Wallets at two independent websites. I sent millibits from one wallet to the other. I hear that you have to use your private key to do that. So, I guess that ...
2
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3answers
170 views

What happens if I send bitcoins to my private key instead of my actual bitcoin address?

I recently used the website https://www.bitbrothersllc.com/Bitbrothersllc/Welcome.html to obtain my bitcoins, but when I was asked what address to send my coins to, I accidentally put down my wallet's ...
0
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1answer
173 views

Security and recover issues in blockchain.info wallet

I have a wallet in blockchain.info. I'm quite new to bitcoin and would be happy if someone would explain me : (1) what should I do in order to save my bitcoins if something happens to ...
0
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1answer
83 views

signrawtransaction - Which private key from BitAddress.org?

I am trying to do multisignature addresses and when it comes time to spend the funds, I am getting stuck. If I create a 2 of 3 multisignature address using 3 public keys that I generate locally, then ...
1
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1answer
64 views

Trying to import a private key into bitcoind

I am in a special situation where I need to import my private key credentials and basically restore a wallet to bitcoind. bitcoind is running and I do have an rpc user/pass and server=1 in the ...
1
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2answers
102 views

Do I need to wait for blockchain to complete to use private key elsewhere?

As the title says: My blockchain sync still needs to sync 56 weeks, but I want to export my private keys from the bitcoin qt wallet to blockchain.info. Is it possible to do that without waiting for ...
2
votes
2answers
94 views

Is it safe not to record private keys for paper wallets?

That may sound like a silly question, but if I have created my keys using a passphrase in “brain wallet” at bitaddress.org, why do I need to record the private key, if I can recreate it at any time by ...
2
votes
1answer
93 views

Need sample compressed and uncompressed Public / Private key pairs for BigInteger

I am testing a different version of BigInteger that has different endian formats and the native implementation likes to add or remove zeros from the final output. Can anyone provide some sample ...
3
votes
2answers
153 views

What encoding or format is the private key in Dumpprivkey?

I'm trying to use the results of Dumpprivkey to sign a message outside of the QT client, however I'm either having a problem signing or extracting the real value of the key. What encoding, endian, or ...
2
votes
0answers
170 views

How to dump all of addresses from wallet.dat for other alt-coins?

I'm on binarycoin now, with solo mining. Luck smile to me. I'm found 5 blocks. It is 100.0 binarycoins. I'm trying to use "aggressive" speed-up, my daemon compiled with -O3. After last block I ...
1
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1answer
795 views

Import private key to coinbase?

Is there a way to import a private key that I have been using in bitcoin-qt to my coinbase wallet?
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3answers
127 views

How do I own my bitcoin address?

I am a bit new to BTC. I bought few via Virwox and it tells me I have an address. People can send money in BTC to that address. I also downloaded MultiBit on my Mac and I got another address. But ...
1
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1answer
94 views

Is it possible to retrieve bitcoins from a Bitcoin address and possibly a private key?

While mucking about with Bitcoin a couple years ago, I setup a Bitcoin address and added a couple bitcoins. I have the Bitcoin address and possibly a private key, but I cant remember how or where I ...
0
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1answer
78 views

How is the wallet balance split across keys?

I suppose it's advisable to use a new key frequently for bitcoin receive address for anonymity. If each received amount goes to a new key, will my wallet size become unmanageable if I receive a number ...
0
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1answer
54 views

How can I copy an address (with the private key) using JSON-RPC?

I need to be able to create an address in 2 different Bitcoin-qt instances (actually 2 different PCs). I can create it using "getnewaddress" on the first one but how can I import it to the second one ...
1
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1answer
63 views

Is there any way to “revoke” a bitcoin address?

Given e.g. one lost the private key to a specific bitcoin address, is there any way to make sure no more bitcoins can be transferred to it since it effectively became a bitcoin-furnace?
0
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0answers
66 views

Serious blockchain.info balance bug?

I noticed after sending a small amount from my blockchain.info wallet, the balance suddenly went to zero! I looked at the transaction on blockchain.info and it seemed normal enough, with what should ...
-3
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1answer
520 views

How can I get/create a private key for my wallet?

How can I get or create a private key for my wallet?
0
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1answer
229 views

Why can the same 12 words produce different seeds in an Electrum wallet file?

I was looking through an Electrum wallet file (from Electrum 1.9.6 for Windows if it matters) trying to understand what information was contained in it, and I couldn't initially figure out exactly ...
0
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1answer
227 views

Public key from private key generation problem

I met some problems, when I was trying to write function able to create Bitcoin public key from private key. I was using the tutorial: ...
2
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0answers
198 views

JSON-RPC signrawtransaction returns false when using private keys

I've been working with BitcoinLib testing various parameters on the signrawtransaction rpc call. It's been mostly successful, however there seems to be a persisting problem when using only private ...
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2answers
175 views

How to find out the ECDSA private key perfix version for Altcoins?

I want to create a paperwallet for an altcoin (Protoshares). I know the public key version byte is 0x38 (56) and the addresses start with P... But how do I find out the ECDSA private key prefix? For ...
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2answers
97 views

Android Bitcoin Wallet - change addresses and key backup

I've had the Android bitcoin walllet for some time. When I installed it I was assigned some public address/key. I have made various transactions in and out of the wallet but as fas as I can telll the ...
0
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2answers
1k views

How are public and private keys related to the wallet?

I understand that all the Bitcoin protocol is based on an asymmetric cryptography. A user gets 2 keys (public and private). How do these keys connect to the Bitcoins? How are the keys are related ...
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1answer
349 views

What is the current state of BIP 38 (encrypted paper wallet) integration with cell phone wallets?

Given current implementations, is there a wallet that I can use to scan a private key, then enter in the password as a PIN, and the wallet will send from the key and sweep the rest onto a key ...
0
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2answers
99 views

Issue after importing private key to MultiBit

I followed another question here and imported my address from Bitcoin-QT to Multibit. The reason why I did so was because I had received some BTC but in Bitcoin-QT it was taking years to download the ...
0
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1answer
142 views

Generating an address from a private key in Java?

I'd like to write a function in Java that takes a private key and generates the address to use in a QR code. I'd like to make this , but I'm not very good with the hashing algorithms. I've checked ...
1
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1answer
81 views

Whats a site or app where I can extract a public key just by typing in a private key?

I read that you are able to extract the public key address from a private key address. Is there a website or app that can do such a thing? I just want to be able to see if I can make up my own private ...
0
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1answer
47 views

A limit on privpub key pairs in a wallet

Is there a limit on the number of private/public key pairs one can have inside a wallet? For instance if I have, say, a 1M transactions could I have a million unique bitcoin addresses...each address ...
-1
votes
1answer
91 views

So every private key actually has TWO associated addresses? (ie uncompressed and compressed)

So every private key actually has TWO associated addresses? (ie uncompressed and compressed) Isn't this a MAJOR flaw if uncompressed keys are still used in applications?
1
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1answer
73 views

Are privatekeys Case-sensitive?

I want to print privatekey into block of steel, but I have only uppercase letters, so I wonder if privatekey is case sensitive?
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0answers
344 views

Can I use Multibit private key for paper wallet?

I plan to export the private keys from Multibit, keep those and delete everything else. Now I read about Multibit having some kind of hidden mechanism for spare adresses within a wallet. Would my ...
3
votes
2answers
128 views

Exhaustive technical explanation of signing & verification

I apologize for such a noobish question and am ashamed that I'm not getting this yet, but I can't seem to put together all of the pieces. I've read every question I can find on the subject, the ...
0
votes
1answer
120 views

How can I turn a private key into a wallet? [duplicate]

I created a vanity public key (wallet address) and I got the corresponding private key too. Is it possible to somehow "open" that wallet and just used it as a normal bitcoin wallet? No sweeping, no ...
2
votes
2answers
158 views

Is it true that as long as you have the public and private key for a bitcoin address, you are safe?

So i created a public & private key on blockchain.info and printed it out as a paper wallet. Am I safe to say that no one can comprise it unless they physically get a hold of my piece of paper? ...
0
votes
1answer
94 views

What is the algorithm for generating a Ripple address from a ecdsa public key?

I know it is some combination of sha256 and ripemd160 that is used on the public key component to obtain the Ripple wallet address, but what is the specific algorithm?
0
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1answer
134 views

How do you derive the public key from you random 256-bits integer?

Once I've flipped a fair coin 256 times and have the random 256 bits integer that I'm going to use as my private key, how is the public key derived? I've read: Given a private key, how do you get a ...
8
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4answers
913 views

Recovering bitcoins after the owner's death

My Brother died in April and we believe he had a bitcoin account. Is it possible to find out how to recover/take over his accounts? I know this is a new form of currency but it seems odd there is no ...