Storing a wallet offline, i.e. making the private keys inaccessible from the web. This is e.g. implemented through use of Paper and Hardware Wallets.

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4answers
353 views

Is holding funds in a Bitcoin paper wallet safe?

If you received lots of bitcoins, like 100, and you are not comfortable holding them in your personal blockchain wallet, is it preferable to move them and hold them in a paper wallet for safety ...
3
votes
1answer
44 views

What is the risk of using wallet.dat files for long term cold storage?

i created these wallet.dat files on an offline machine in 2014 using QT. I've sent coins to the receiving addies over the years. these files are bip38 encrypted. do i need to do anything to these ...
3
votes
2answers
45 views

Safely transferring bitcoins from wallet.dat to cold storage

A similar question was asked by me in 2014, but I did not find the answer satisfactory back then, and I hope some things changed since in the last two or so years. I have a wallet.dat file with some ...
6
votes
3answers
545 views

What is the safest physical to store a private key only to be accessed after death?

Assume that my friend would like to encrypt his Bitcoin private key(s) and safely store them in a secret location. This located would only be identified to heirs after death in his will. Should he put ...
6
votes
1answer
33 views

Is it safer to use one type of hardware wallet of several?

I know that there are several brands of hardware wallets with open source firmware that are considered safe. Is it better to just one that is safe and you are most familiar with? Or would hedging by ...
2
votes
4answers
157 views

How can I hold Bitcoins safely in the long term?

Say I wished to hold a lot of bitcoins for many years as an investment. My worry would be about the long term safety of the different wallet mechanisms. If it's a website - what if it goes bust or ...
4
votes
2answers
155 views

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 ...
2
votes
1answer
124 views

Transfer coins from Armory paper backup without Armory

I have an armory offline installation on a USB stick with Ubuntu. From this wallet I have a paper backup. To access my funds I tried to install Armory on Mac OS and Windows 7 with no luck. The best ...
2
votes
1answer
114 views

Cold storage for bitcoins

I'm planning to store some bitcoins in cold storage. I'm doing a very simple setup, no complicated algorithms, no wallets... Here is my plan Create an air-gapped machine with a Linux distro. The ...
1
vote
1answer
536 views

Hot wallet and cold wallet

If you have a online site that accepts bitcoin deposits and users can withdraw their balance, Is it possible to have the deposits go to the watch-only address of a cold storage and the withdraws come ...
11
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2answers
474 views

Estate planning: how can I ensure my bitcoins are inheritable?

What are good ways to ensure my bitcoins can be inherited by my family when I die or become permanently incapacitated? I think there are probably two significantly different situations to account for,...
1
vote
3answers
113 views

Cold storage companies?

I was curious to know if anyone knows of any bitcoin business that stores people's wallets offline? I'm looking to diversify my backup methods for cold storage and am wanting to send my backups to a ...
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vote
0answers
104 views

How can I tell if files from coldpi are backdoored?

I'm trying to install Armory on a Raspberry Pi. I have tried installing the [Offline Bundle] for RaspberryPi (armhf) from http://bitcoinarmory.com but I'm getting compile errors on Raspbian. I also ...
4
votes
2answers
278 views

Using Armory Watch-Only wallet in Electrum?

Is it possible to import a Watch-Only wallet that was made in Armory into Electrum? I like to use Armory for cold storage but like Electrum more for hot wallets because it's lightweight and you never ...
3
votes
1answer
211 views

How would one go about generating a BIP-38 encrypted vanity address for cold storage?

I want to generate a vanity address with BIP-38 encryption for a cold storage paper wallet, how would I go about securely making one? From what I've found, generating a vanity address with Vanitygen ...
1
vote
1answer
159 views

Encrypting Bitcoin private keys instead of printing out paper

I follow the procedure of making a cold storage wallet: downloaded copy of bitaddress.org using an off-line computer booted with Ubuntu from CD. Instead of printing out the private keys and ...
1
vote
1answer
104 views

How do I prevent the standard Bitcoin client from sending some of my Bitcoins to a change address?

I found somebody that imported a paper wallet with 100BTC then used 2BTC BUT the other 98BTC were sent to a change address. Why and how can I prevent this; how can I enter a custom change address?
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vote
1answer
1k views

How can I install a bitcoin wallet on Kali Linux?

I got Kali Linux installed on my laptop and I want to install a good bitcoin wallet to store my bitcoins offline.As I know,top 5 best bitcoin wallets would be Bitcoin Core (the first offline wallet),...
4
votes
2answers
347 views

BIP38 or Brain wallet?

I have seen many videos about paper wallets and different ways to store BTC. And I have choose to store using a cold wallet (paper wallet). But I am not sure what option I should choose: a normal ...
3
votes
3answers
705 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
184 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
148 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 ...
3
votes
1answer
322 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
votes
1answer
187 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 ...
5
votes
6answers
325 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
289 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 ...
0
votes
1answer
116 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 ...
3
votes
1answer
147 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
91 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 usable/...
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vote
2answers
88 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
votes
1answer
179 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 users?...
3
votes
1answer
148 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
620 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 ...
4
votes
1answer
198 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
117 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
285 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
541 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?
5
votes
1answer
427 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
489 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
605 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
134 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
3answers
101 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
2answers
379 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
819 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
205 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?
5
votes
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
1k 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
245 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 ...
7
votes
4answers
3k 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 ...