Questions tagged [offline]

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vote
3answers
621 views

Make sure my offline Wallet is ok?

Let's say I make an offline wallet from a live cd with bitcoins-qt. I make some addresses (10 pcs.) I encrypt the wallet. Save it on a usb (wallet.dat). I then send over some bitcoins to one of my ...
1
vote
1answer
329 views

Paper wallet vs wallet.dat on memory stick for long term storage?

What does everyone think? Also what are the advantages and disadvantages of each one?
2
votes
2answers
2k views

Private key generation bitaddress.org vs application wallet (armory / bitcoin-qt)

Is an application like armory or bitcoin-qt more secure/ trustable in generating the public and private keys than a locally installed version of bitaddress.org ?
1
vote
1answer
981 views

How to withdraw from an offline / paper wallet into Bitcoin-Qt on Mac? [duplicate]

I understand how to create and deposit into an offline wallet, but how do I retrieve the BitCoins back onto a local Bitcoin-Qt wallet on a Mac?
3
votes
2answers
238 views

What is a cost-efficient, fast and easy method of transferring btc between own computers?

I use a few computers and would like to perform bitcoin transactions from any of them. Thing is, I'm not very fond of the idea of paying the fee and waiting every time I want to transfer the coins ...
4
votes
2answers
525 views

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 ...
3
votes
4answers
1k views

Backing up wallet with pen and paper, destroying electronic copy, restoring from keyboard — how?

I have bitcoinQT with some coins on it. I want to use the internet on a regular basis from this computer. I do not trust the authors of internet applications and commercial operating systems. I ...
2
votes
4answers
763 views

Offline Bitcoin payments

how secure and time efficient is offline bitcoin transactions or payments through bluetooth or NFC? The scenario of paying through your mobile (offline) and the receiver checks the transaction. And ...
1
vote
2answers
1k views

Electrum only offers online wallet, does it not?

I am currently using Bitcoin-Qt and have just surfed to Electrum's website. It seems that Electrum only offers an online wallet, not offline. Is that correct?
5
votes
1answer
415 views

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 ...
2
votes
1answer
168 views

Can a transfer be done over postal mail?

Suppose I'm stuck in the middle of nowhere with no internet access and I want to make a payment to a certain Bitcoin address. Is it possible to do a transfer via postal mail, and if so what ...
6
votes
3answers
7k views

Sending bitcoins programatically without running a node [duplicate]

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?