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Questions tagged [private-key]

This tag should be used for questions pertaining to private keys. Private keys are used for signing transactions and allow the holder of the private key to spend the Bitcoin associated with the address derived from the private key.

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104 views

where is the bitcoin's private key saved?

I'm making a service and I will have to take charge of users' private keys So I'm really worried about it.how should i take charge of that?
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1answer
130 views

How can wallets users know their private keys?

Why don't some bitcoin wallets give the private keys to its users? Is it safe to use these wallets? Is there any way for the users to know their private keys without the need to contact the wallets ...
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1answer
167 views

How to import Multibit HD Wallet in bcoin?

I created a wallet using Multibit HD and noted the mnemonic. I sent some money to an address that showed up in Multibit HD. Worked fine. Transaktions are displayed and balance is adjusted. Can be ...
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0answers
201 views

how to import my wallet from blockchain.info into bitcoin-qt?

I have read the related discussions about how to import a wallet and though they are close, the answers does not help with this problem so I'm asking it here and now. I have my bitcoin public ...
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1answer
96 views

Bitcoin Wallet Recovery

Hypothetically, if you formatted over a hard drive and erased your wallet but had your private key and address written down- how would you once again regain access to your wallet?
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1answer
942 views

Wallet: how to generate public extended key?

As far as I understand, when I want to create an HD Wallet, do I need a private key that is derived into an extended public key? So, my question is, if I am coding a portfolio of bitcoin in java, how ...
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3answers
204 views

What happens if you copied private key and try to use it again?

I am very new to bitcoins. I have one question. Suppose some one copied their private key and saved it in their harddisk. Next they will do the transaction. Now since you already copied the private ...
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2answers
4k views

Convert WIF to private key

I am aware how to convert the private key into WIF format in python, now I am trying to reverse this process and convert a WIF formatted private key back into a 256-bit private key, following this ...
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2answers
713 views

BCC, BTC Private Keys

If you were to send BTC accidentally to a BCC address then would the funds have been sent to the same private key on the BTC blockchain? Would the owner of the BCC key be able to retrieve those coins ...
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2answers
228 views

How to trade BCC with Blockchain app and private key

There is something I do not understand. I have handled a few bitcoin transactions using Android Blockchain app and imported private key. That worked and could buy/sell with btcdirect.eu (start ...
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1answer
178 views

Using bitcoin-qt. Address with my funds does not show up. Can I import it?

I have bitcoin-qt and was just recently aware that it changes addresses all the time. I am afraid that my last wallet.dat backup was before my last transaction, at which the receiving address was ...
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1answer
4k views

Encypted Private Key -> QR Code

I have a paper wallet with a public address and an encrypted private key ( with a passphrase ), but no QR code. So I need a way to generate a QR image, or manually input the key. Sadly QR generators ...
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3answers
763 views

Curious about lost bitcoin

The Merkle reported a user lost 17BTC in a fire that destroyed his private keys and backups. Are those BTC (out of the fixed 21x10^6) lost forever? I assume they are and assume there are many lost ...
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0answers
2k views

Importing paper wallet into Electrum

I'm attempting to understand the workflow of sending bitcoin to a paper wallet and retrieving it. I'm using small amounts until I get the hang of things. I've created and sent bitcoin successfully to ...
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3answers
4k views

Bitcoin Cash Multibit HD/Electrum

If I had my BTC in a multibit HD wallet prior to the fork, and I exported my wallet to Electrum after the fork, will the BCH still be tied to the multibit HD wallet? And if so, how can I access the ...
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1answer
94 views

Would backing up my private key be enough?

Lets say I put my wallet's private key on a rocket and fire it towards mars. In 50 years time I travel to mars for a cheap vacation and find my private key. Would I then have full access to my ...
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2answers
8k views

How to sweep private extended key from mycellium for bitcoin cash coins?

I have my coins stored in mycellium, but when I try to export my private key I get a private extended key. How can I import this into coinomi android wallet? I see there is a sweep option in conomi, ...
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1answer
2k views

How to derive the private key associated with a Coinbase multi-sig vault address

When I created a multi-sig vault on Coinbase, I obtained: A master public key in BIP32 extended format, of depth 0, parent fingerprint 00000000 and child index 0. A private key in WIF format ("user ...
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0answers
1k views

How to decrypt my bitcoin?

I encryted several bitcoin 4 years ago and have the file and the password. I've now installed Bitcoin Wallet on my Android smartphone. How do I go about getting the file decrypted? I'm a complete ...
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2answers
550 views

Creating address from private key (bitcoin puzzle)

I saw a puzzle here and I'm having problems understanding how the addresses are created. So the post there has a list of addresses like: Address 5: ...
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0answers
3k views

To get Public key from Private key

How can I get the corresponding public key of a particular private key using bitcoin core console commands? , just as we can have private key of particular address using dumpprivkey and public key ...
2
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1answer
1k views

To get the master private key of HD wallet

How can I get the master private key of HD wallet bitcoin core satoshi client 0.14.2? Any command for that on bitcoin core console? Currently I am on Testnet3.
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1answer
2k views

How to convert a WIF private key to a BIP32 extended private key

I am trying to recover the extended BIP32 master private key from its extended BIP32 public key (which I already know) and a WIF private key (which I obtained by decrypting a BIP38 seed with a ...
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1answer
13k views

How can I get the private key from wallet.dat from 2011 Bitcoin software on WinXP?

I set up Bitcoin (application) software on a WinXP machine in 2011 and received some Bitcoin. I set the machine aside, disconnected from the internet. Now I want to access the 2011 Bitcoin. Lately I ...
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1answer
1k views

Help with very old wallet.dat file and keys, next steps?

recently I found a very old wallet.dat file back from 2011 (I did some mining back then). I was able to run pywallet to export the keys into JSON file, this file includes private keys and all, so i ...
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2answers
210 views

What are secure ways to spend lot of bitcoins on offline generated address with keys on paper wallet

Suppose I have lot of bitcoins on offline generated address and private key stored on paper wallet. Now I want to spend/sell these bitcoins. What are secure and effective ways to do this? I will ...
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1answer
199 views

How to know how many bitcoins does my offline generated address hold?

Suppose I generate an address offline, using something like bitaddress.org And then I receive some bitcoins on this address. How do I know how much balance do I have on this address?
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2answers
610 views

How does a wallet come to know of Address just by importing Private key?

I have exported my Private key to Paper Wallet. Now, when we send/receive bitcoins, we send/receive them to an "Address". So suppose I receive some bitcoins on my address. I have the private key of ...
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2answers
4k views

Why do wallets use multiple private keys instead of one each?

I am learning about Bitcoin and when I was about to export my private key from a single electrum wallet, I found that there were in fact a lot more than one. Why is that so, don't you only need 1 ...
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2answers
4k views

How does Trezor's wallet recovery work if the private key never leaves the device?

If the private keys never leave the TREZOR, how can they be restored if I lose it? I am assuming that maybe the private key is generated on the TREZOR and then encrypted before being sent to ...
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0answers
521 views

Is the following a valid bitcoin private key? - FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFE

In secp256k1 (Bitcoin's elliptic curve) it is defined that valid private keys may range from 1 to FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFE BAAEDCE6 AF48A03B BFD25E8C D0364141 - 1. (https://crypto....
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1answer
753 views

When creating a transaction, how can you prove that you own your address without exposing your private key?

I'm trying to understand how Bitcoin works under the hood, but there's something I don't get at all, and can't find it. Suppose I own address A (I have the public key, A-public, and the private key A-...
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1answer
808 views

Private Keys in my Bitcoin Wallet? [duplicate]

What are 'Private Keys'? and where do i find them in my wallet? How do I know it is a private key?
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0answers
403 views

What offline programs exist to generate deterministic BITCOIN address?

I am looking for a program (code or software, called the way you want) that can run totally autonomously, not requiring to be connected to Internet or to have a specific bitcoin software installed (...
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0answers
564 views

Stealing of encryption keys

I am new to source code of bitcoin , but so far i have analyzed the source code it seems that encryption keys can be stolen from memory by this technique. This is something hackers often do to steal ...
2
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1answer
247 views

What happens to Private Key on Payment

If I pay someone in bitcoin, presumably I have to utilise both my private and public key in some way, and presumably this has to be verified by the network. Now does the network thus obtain my ...
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1answer
151 views

Armory synchronization takes forever. How can I speed it up or retrieve my coins?

I have an Armory wallet that has been offline for a long time. When I start up that computer it runs just fine, however it is taking forever to download the blockchain. Based on my estimate of the ...
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3answers
2k views

Can rainbow tables be used to find private keys from public keys?

I understand that the public key is kept hidden until a bitcoin transaction is made, at which point the public key has to be revealed to prove that you created the transaction with your private key. ...
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0answers
6k views

Unable to remove bitcoins from watch-only address

I'm new to bitcoin and my situation is this: I installed Bitcoin Classic wallet, then sent bitcoins to it from Coinbase before the entire blockchain was finished syncing. The transaction timed out and ...
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2answers
4k views

How to get the private key in hex from the output of dumpprivkey

I am trying to create raw transactions according to the excellent answer of runeks here: How to redeem a basic Tx? But there he starts with a private key in hex format ...
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1answer
700 views

How to create a deterministic wallet using bitcoinjs-lib

I'm new to bitcoin technology, however, I'm trying to develop a web wallet using bitcoinjs-lib that works like that of blockchain.info. I've gone through the code samples on the github repo but couldn'...
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1answer
186 views

Is it possible to have a bitcoin private key (hex) with 34 length?

Something like 111111111111111111111111111ABcDE1f.
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1answer
1k views

How can I recover the private key for my bitcoin address?

I want to make withdrawal from my Bitcoin address to which I just transferred some bitcoins. The address has changed after I made a transactions to the first address. But it was requesting the private ...
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1answer
433 views

API to send bitcoins from paper/cold wallet?

I am making a program which will take a .wif private key, and send all funds from the wallet represented by the key to a certain address. I need this to be fully automated, but I can't seem to find ...
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3answers
2k views

Can private keys be securely stored on blockchain?

Ok, I know that blockchain is public knowledge. But, than, there are experiments like zcash which encrypt sender receiver and amount information and they still work. I'm considering whether p2p ...
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1answer
574 views

Using shapeshift to buy cryptocurrencies

I want to buy Monero using Bitcoin with Shapeshift API : Here are my steps : I generate a public address on https://moneroaddress.org/ The address is PUBLIC_ MONERO_ADDRESS I already have Bitcoin ...
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1answer
139 views

Given a set of consecutive HD private keys, can you generate the next private key without knowing the master private key?

I'm wondering whether disclosing a consecutive number of HD private keys derived from a given master key would allow someone to compute what the next private key in the sequence would be before it is ...
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1answer
97 views

Restore keys from keypool

So, I generated a new address with getnewaddress and made a payment to it. Soon after the computer bitcoind ran on shut down (due to loss of power) and after booting it up again my wallet doesn't know ...
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2answers
432 views

How can I officially prove that a Bitcoin private key is owned by an entity?

I am the co-founder of an early-stage startup that aims to prove existence of various qualifications (academic, professional...) via the Bitcoin Blockchain. In order to validate a piece of data, an ...
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1answer
1k views

What is a Key pair? & relationship with adresses?

does a generated private key, provide 1 public key? I mean, the pair is generated practically at once? Then this only public key is used to create multiples “adresses” which will be used to make ...