5
votes
Signing a bitcoin transaction OFFLINE fails
signrawtransactionwithwallet uses the wallet for two purposes:
Finding the private keys necessary to sign with (which you dealt with by importing)
Finding the transaction outputs that are being spent ...
- 110k
4
votes
Security implications of regular saving into cold storage
Q1: Depens on how you use it.
Transactions to an address does not decrease it's security.
Using a cold-storage wallet and taking it online exposes your wallet and it's security.
Q2: It's correct. ...
- 163
3
votes
Accepted
What if I receive bitcoins when my device is powered off?
Solution
This works fine.
The bitcoins will appear next time I start my wallet application. (Read tuxcanfly answer)
Bitcoins are not actually received by the software (wallet) on my computer, they ...
- 153
2
votes
What if I receive bitcoins when my device is powered off?
The network contains those transactions (either in nodes' mempool or block) and you will receive your Bitcoins when you are back online.
- 395
2
votes
Security implications of regular saving into cold storage
No it will not decrease the security of this wallet. Security concerns happen when you have to use your private key (i.e when you spend money).
Reusing an address will indeed allow other people to ...
- 236
2
votes
Accepted
Pay invoice to offline lightning node
It seems you are mixing two concepts in your question.
1.) the necessity of having an invoice
2.) the necessity of being online
Re1: invoices are not necessary with the not standardized keysend ...
- 11.9k
2
votes
Bitcoin stolen from Electrum 2.9.3
Easy.
Someone has/had remote access to your wallet/files. They don't need access to the computer during the time of a transaction. Example: Send me your wallet and go ahead and secure your computer ...
- 201
2
votes
Accepted
Does a long time storage wallet need to be online?
You don't need the 3rd step for long-term storage. You don't plan to spend your bitcoins any time soon when you're looking for long-term storage. If you download the blockchain now, it will long be ...
- 3,244
1
vote
Accepted
Offline transaction on exchanges
Businesses that provide accounts can transfer notional amounts of money between two of their customers, debiting one customers account and crediting a second customer's account. They can do this ...
- 28.5k
1
vote
Where to find a people who have bitcoins, to exchange USD to BTC with no KYC offline?
Service recommendations are off-topic here, but more generally, you can just look around online to find out if there are any local bitcoin meetup groups in your area. Attend a meetup, talk to some ...
- 18.4k
1
vote
Create offline bitcoin tx for p2pkh address in a user-friendly way?
I think electrum is perfect here among its functionalities it is user friendly and it support offline transactions for P2PKH addresses securely and also offline transaction signing.
You can have more ...
- 2,855
1
vote
Accepted
What if there where no nodes to share a new block
Yes networks that are cut off from one another, cannot intercommunicate and therefore cannot transact with one another.
- 28.5k
1
vote
Generating paper wallet offline with liteaddress GitHub download
Yes, you open the HTML file in a web browser.
You can use either bitaddress.org.html or index.html
Just so you know, none of the files are signed, so you can't verify the authenticity. I believe ...
- 1,311
1
vote
Accepted
Eliminating all private keys records from pc
What you describe has some risks:
The new PC and router likely won't have the latest software updates, which could increase the chance of it being compromised immediately
The bitaddress.org website ...
- 11k
1
vote
Does a long time storage wallet need to be online?
Yes, except step 3 is unnecessary and wasteful of your storage space. A Bitcoin wallet is just a collection of private keys associated with addresses that have received transactions and therefore hold ...
- 1,041
1
vote
Accepted
How to create a physical/paper backup for bitcoin-core wallet?
if I generated 100 addresses and transferred some BTC to all of them, I need to backup all the 100 addresses.
Bitcoin core is an HD wallet. So you should only need to backup the extended master ...
- 28.5k
1
vote
Is there a way to create a tx completely offline? Maybe with a script or cli commands?
In this approach, Bitcoin Core is used to create the transaction offline without the hassle of manually creating the transaction:
How to move/sweep your Bitcoin Core bitcoins safely and air-gapped to ...
- 101
1
vote
Is there some kind of USB antenna I can buy to be able to use Bitcoin even when there is no Internet?
Blockstream have multiple satellite circling around the earth and broadcasting the blockchain or receiving and sending transaction without interruption.
https://blockstream.com/satellite/
They have ...
- 2,855
1
vote
Accepted
Offline Bitcoin Wallet
The only thing you need to spend bitcoins is a Private Key, I recommend that you create a Private Key beeing offline, then import it to Bitcoin Core wallet or Electrum Bitcoin wallet (if you don't ...
1
vote
Taking out bitcoin from offline wallet
Yes, bitcoin is divisible to the 0.00000001 bitcoin, we call this small amount the "Satoshi" for example so even if you got less than 1 bitcoin you have a pretty wide margin on what amount you want to ...
- 2,855
1
vote
how to get bitcoin off an exchange?
Receiving funds in Bitcoin is an asynchronous and passive process.
A sender creates a transaction which consumes some unspent transaction outputs (UTXO) and assigns the freed-up value to newly ...
- 77.9k
1
vote
Accepted
What really happen when user moves fund between Main Account and Trading Account in HitBTC?
This is purely an internal accounting move, no keys are involved.
Their comparison to a hot/cold valid is likely just an analogy. In reality, their application layer (or some middleware) enforces ...
- 17.3k
1
vote
Signing a bitcoin transaction OFFLINE fails
I have a very old Greg Maxwell tutorial for this slightly old question
https://web.archive.org/web/20171124193914/https://people.xiph.org/~greg/signdemo.txt
The tutorial uses 'bitcoind' as the command ...
1
vote
What if I receive bitcoins when my device is powered off?
Money (BTC transaction) is being send from one wallet to another,
that is being recorded in a book (public ledger),
which is written by many people (miners) and
kept securely by other people (BTC ...
- 1,103
1
vote
What if I receive bitcoins when my device is powered off?
Yes. You can even send bitcoins to 'cold storage' or a 'brainwallet', which is pretty amazing IMHO!
- 186
1
vote
Settling offline transactions
I'd say there are number of issues at play here. If the system is "offline" then the only update you'll have to balances is whatever was last stored. The assumption here is both sources are trusted, ...
- 385
1
vote
How to BIP38 existing private keys offline
The Bitcoin-Explorer (bx) v3.0 implementation described below has had FULL BIP 38 functionality for over a year, and has extended BIP 38 to numerous altcoins.
See 5) Extended AES256Encrypt and ...
- 3,077
1
vote
Does a thin client testnet wallet exist which allows offline signing?
It looks like a testnet option was merged in early 2017, but I'm not sure if it was released:
https://github.com/spesmilo/electrum/commit/d042d6e970389f97331e9caae196bf7a3af1e293
https://github.com/...
- 2,431
1
vote
Does a thin client testnet wallet exist which allows offline signing?
Testnet transactions have the same format as mainnet transactions, so you can just create a raw transaction on your online testnet wallet, and get it signed by Electrum with a private key it thinks is ...
- 1,041
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