Bitcoin Stack Exchange
Bitcoin Stack Exchange

Questions tagged [offline]

74 questions
19
votes
2 answers

How to sign a transaction using only an offline computer?

I think it is possible to generate keys on an offline computer and sign. To create a transaction I need to input transactions detail, and somehow I have to transfer signed transaction from offline computer to a online computer to relay the…
vi.su.
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11
votes
1 answer

How to download bitaddress.org to use offline?

The site does not have a download option. I can save the page using Google Crome by CTR-S, but the version I have saved in this way does not work.
Peter
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10
votes
4 answers

Do any of the Android-based wallets support cold storage?

Specifically I'm looking for Armory-like functionality where the transaction can be generated on an online system, transported to an offline android tablet or netbook via USB or QR code where it can be signed, then transported back to an online…
David Perry
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9
votes
4 answers

Offline Wallets: Electrum vs Armory?

I'd like to secure my bitcoin with an offline wallet. A lot of security conscious people seem to use Armory. I am trying to get a better understanding of the differences between these two clients. I plan on having a cheap netbook, never touched the…
John
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8
votes
2 answers

Settling offline transactions

Use Case My use case is around a scenario where both customer and merchant possess offline wallets with a balance that has had confirmation on the blockchain. To begin with, let us say that, the merchant and the buyer's wallets show balances of 20…
cogitoergosum
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8
votes
2 answers

How to safely spend from a compressed key offline?

Armory supports offline transactions nicely, but doesn't support compressed keys. A number of other ways exist for creating offline transactions, but all of them - every single one I've seen - requires one to manually create a raw transaction. This…
user10113
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8
votes
2 answers

How do I transfer BTC in cold storage?

I understand how to send BTC to cold storage or offline wallets, but I can't seem to find information on how to send BTC from cold storage to, let's say, a wallet on my computer, or a website, or a friend's online or offline wallet.
CR47
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7
votes
3 answers

Sending bitcoins programatically without running a node

How can I send bitcoins in my web app without running the daemon on my server? Is there a way to do it? Do third parties allow you to send through them?
BitWarrior
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7
votes
2 answers

Why does Bitcoin Core take up so much space?

I have downloaded Bitcoin Core and the blockchain has nearly filled my local storage. Can i move the wallet to a hard drive and then delete Core from my computer? I'm a newbie lol
M Mcgowan
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7
votes
3 answers

Can I spend/transfer bitcoins directly from cold storage?

From reading previous articles I understand that you can receive bitcoins to an address even if your wallet is in cold storage because the bitcoins sent to this address is recorded by someone on the block chain. Is this correct? and who is this…
Vinny
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5
votes
1 answer

Keeping a portable long-term offline wallet

I'd like to keep some bitcoins as a long-term investment - store them to a pen drive which I stash in some safe place, or otherwise backup it securely, then remove all traces from my online computer never to worry about this particular wallet…
SF.
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5
votes
2 answers

What is the best method for creating a paper wallet?

I am looking to move some of my bitcoins from cold storage to a paper wallet. I have heard that metal stamping is one of the better long term strategies since paper can burn or fade. Any other suggestions? Thanks in advance - Kristine
Kristine Aurum
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5
votes
1 answer

Is it possible to have complete cold storage in NXT?

BTC has capability to create new account on offline computer and send some coins to and from that account without ever going online. Sending coins to that account is trivial. Sending from that account is done by generating transaction on offline…
CoinsKillTheFed
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4
votes
2 answers

Security implications of regular saving into cold storage

I am thinking about following this plan: Regularly buy bitcoins in an online exchange, 100€/month at market prices. Once the balance in the exchange exceeds a certain limit (500€), move those bitcoins to cold storage, as long-term savings. (the…
Em Edih
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4
votes
2 answers

Watching and spending from a huge number of offline private keys

We plan to accept bitcoins on our eshop website. What we want plan on doing is: 1) Keep all private keys always offline (cold storage). 2) Generate at least 100,000 keypairs of which only one will be stored on our web server. 3) Frequently change…
Inqier X
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