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3answers
56 views

How can an online wallet be more secure than paper wallets or cold storages?

Recently, after I was reading that some bitcoin early adopter lost 750 BTC due to theft from his macbook, I was looking for the most secure storage solution for my coins. I already know about paper ...
2
votes
1answer
58 views

How to securly move bitcoins from a wallet.dat file to a paper wallet? [duplicate]

I have an old wallet.dat file with a few Bitcoins. It is stored in an isolated computer that is not connected to the internet. I would like to get rid of the wallet.dat file, and move all the ...
0
votes
1answer
75 views

Coinbase Security

Does anybody know how cold is the Coinbase cold storage? I'm not really into Coinbase but when I read about their cold storage I become a little bit skeptical: for example, how do they process ...
2
votes
1answer
83 views

What is the equivalent of cold storage or paper wallet for NXT?

I want to be able to secure my NXT in cold storage. What are some ways of doing this? Since NXT is only accessible via a brain wallet, I can just store the passphrase on a paper, but what if I ...
2
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1answer
68 views

brainwallet.org Low Entropy Generation

I was reading that brainwallet.org uses low-entropy RNGs, so any address generated using their website will be unsafe. I used their website to make a cold storage address last December, and so far no ...
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4answers
116 views

Safely convert paper wallet to encrypted online wallet

I started investing a not insignificant part of my salary into BTC a few years ago. I created 10 paper wallets (using bitcoinpaperwallet.com) on a dedicated laptop disconnected from the Internet. I ...
2
votes
1answer
161 views

Is this a safe method for cold storage?

Here is the method I plan to use for creating a cold storage. I am very new to all this, and have never used Bitcoin before. I am not very technical either. Anyway, here it is: Create a live-cd with ...
1
vote
1answer
70 views

Beginning the process of buying bitcoins

I am interested in the process of buying bitcoins, but I have many questions. First and foremost, how do I begin this process? I am looking to make my bitcoin wallet as secure as possible, so how ...
0
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0answers
19 views

Any options for sending Cold Storage funds in memory like Mycelium?

Mycelium has a feature that allows for importing a Cold Storage wallet into memory, sending out the funds, and then destroying the memory traces of the private key. I really like this option but ...
3
votes
1answer
64 views

Sending from CryoBit Cold Storage

I just purchased a pair of CryoBit cards and it occurred to me that, while I know how to send money to a cold storage wallet, I am not exactly sure how to send money out. I assume I import the ...
1
vote
1answer
68 views

How to store/export coins from bitcoind to papper wallet 'cold storage'

I have bitcoind 0.9.1 installed on my VPS debian server. I would like to store my coins via "cold storage", on paper wallets. I read some articles over internet, but i don't know which one is ...
0
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2answers
61 views

How to transfer signed tx from coldstorage to online system for submission into blockchain?

I am building an exchange for crypto currency. I need to be able to transfer tx from cold storage(offline) to hot wallet(online system) for submission. Usb stick is suitable for an individual user ...
0
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1answer
92 views

crypto currency exchange and cold storage

Most of the crypto currency exchanges use cold storage for depositing bitcoins. I was wondering if they maintain a cold storage for individual user or if they have one large cold storage for all ...
3
votes
1answer
109 views

Bitcoin Cold Storage Question

I am ready to put some of my BTC holdings into a couple different cold storage wallets. I went through the process already moving around a few mBits as tests, created the keys on an offline PC, sent ...
2
votes
2answers
177 views

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 ...
3
votes
1answer
114 views

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 ...
1
vote
1answer
96 views

Manually doing what bitaddress.org does

I want to create a paper wallet but want to do it manually. I understand that bitaddress.org automates the process for you. Do instructions exist which I can follow to do the same thing which ...
1
vote
3answers
254 views

Can a cold storage bitcoin wallet become obsolete?

Will a cold storage wallet always work? What happens if the bitcoin protocol is updated? Is there a vulnerability in the protocol that could be changed to create this situation? Where is this ...
0
votes
1answer
305 views

Can I run Armory on a Chromebook?

I want to buy a cheap computer to use exclusively as a secure offline wallet for cold storage. I am considering a Chromebook. Has anyone managed to run Armory on a Chromebook?
2
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0answers
368 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 ...
2
votes
2answers
378 views

What do I need to consider, when I chose media to store a cold/offline wallet?

I'd like to stash away at least part of my Bitcoins in an offline wallet which I will put in a bank deposit box. Which media is recommended to use for that? Should I burn a CD/DVD or put it on an USB ...
0
votes
1answer
465 views

Transfer BTC from online wallet to paper wallet

I just wanted to post this here to make sure I am doing this exactly right. I created an online wallet with block chain dot info (cant post links with my rep) I am going to buy BTC's from bit ...
2
votes
1answer
119 views

Is there a way to prove control over specific number of BTC kept in cold storage?

Suppose I have a certain number of bitcoins kept in cold storage. Is there way to prove that I control those coins, or any coins totalling a certain amount, to another party without transferring them? ...
2
votes
2answers
90 views

Security for bitcoin businesses with Employees

Have been investigating some of the gateway apps and offline systems that are being developed. I was wondering what is the most secure way for a business to conduct itself. Let's use a bar as an ...
2
votes
1answer
308 views

What is the most efficient and safest way to handle cold&warm Bitcoin storages?

Think of a situation where you receive and send bitcoins on a regular basis, like an exchange or a payments processor. You want to keep as large a portion of your coins as possible on the cold ...
3
votes
2answers
711 views

Can I send btc to a totally offline wallet?

I want to setup a totally offline armory wallet. is it possible to send btc to a totally offline pc? Is it also safe, I guess it must be synchronized with the whole network, right? And there is ...
2
votes
1answer
192 views

Not totally cold but how cold and safe is it?

If I put my btc in a wallet in a pc but never connect it to net unless i need to use btc, is it practically cold storage and how safe is it?
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2answers
2k views

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 ...
2
votes
3answers
887 views

Why does using a wallet in cold storage make it less secure?

According to How to set up a secure offline savings wallet, Every time you retrieve bitcoins from your savings wallet, create a fresh savings wallet by repeating the above procedure, and send all ...
5
votes
1answer
212 views

How to implement cold storage payments using bitcoind

I wonder what APIs of bitcoind I can use to sign a transaction without actually publishing it. I read that createrawtransaction (in conjunction with signrawtransaction) is a bit risky and for sure ...
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4answers
2k views

Secure way to store BTC over a long time - and its risks?

What are the most secure way to store a huge amount of BTC over a long time and its (detailed) risks? A other assumption is that the owner does not have a very technical background, thus it will not ...
2
votes
1answer
2k views

Researching Bitcoin Wallet clients to use? Which one provides the best peace of mind?

So far I've just been using Bitcoin-Qt for win7 and the regular android bitcoin wallet from andreas. But now I want to store my bitcoins in a safe place and I'm not sure which wallet client I should ...
1
vote
1answer
2k views

Can Multibit be used as an offline cold storage solution similar to a setup with Bitcoin-QT?

Currently have my cold setup offline in Bitcoin-QT. Downloading the blockchain from zero is rough. It's time to update. Can I create a similar cold storage solution with Multibit? Will this speed up ...
0
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3answers
545 views

How do I make a Bitcoin “memory wallet” (or paper wallet without paper)?

I'd like to see a video tutorial that explains in detail how to make a paper wallet without paper, AKA, a "memory wallet" -- thx.
4
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2answers
410 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 ...
6
votes
1answer
334 views

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 ...
1
vote
0answers
149 views

Suggestions for hoarding strategy and technics

I've finally managed to figure out bitcoin, it's fantastic, now I have a goal of buying some coins while they're still affordable. Please provide some advice for a fellow hoarder. Just keeping all ...
0
votes
1answer
1k views

Bitcoin-Qt client: Easy way to using a wallet.dat not in its default location/when it asks for my password at all?

It doesn't have to be called "wallet.dat", right? That would be too obvious. Can you call it anything, with any extension? Bitcoin-Qt is just not so trivial to me to use since the trivial way would ...
3
votes
1answer
318 views

There is at least one totally “offline” backup of blockchain?

I know that it can be a little paranoid yet, but anyone ever did an offline backup of blockchain in case of a kind of geomagnetic storm? Imagine if all clients of the world lost the data. I know the ...
3
votes
1answer
185 views

Best practices for service/merchant handling bitcoins [duplicate]

Possible Duplicate: Best way to safely host a high volume online transactional wallet? There have been numerous incidents where bitcoin services have been hacked and large amounts of ...
8
votes
1answer
372 views

How can an online system detect coins sent to its offline (cold) wallet?

Say, for security reasons, that a bitcoin business has an online wallet (aka hot wallet) with enough coins for day-to-day operations. The rest of the funds are in an offline wallet (aka cold wallet or ...
2
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0answers
160 views

Is there a way to import a private key already protected with the passphrase?

Let's say I have a hot wallet that has passphrase encryption enabled. Then let's say a large withdrawal needs to occur but the hot wallet has insufficient funds and a transfer from cold storage is ...