_ Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top up vote down vote favorite 2 Let's say I have 10 bitcoins.I won't be using 8 of them any time soon.How can I put the 8 in a separate "offline" wallet not related to the bitcoin client?This would be a good security measure.If the bitcoin client is ever compromised, only the remaining 2 bitcoins would be at risk.It seems rather reckless to have all of one's savings in the same wallet.wallet up vote 6 down vote Go to your Bitcoin data directory Backup your wallet.dat to a safe location Move your wallet.dat away from the data directory Start Bitcoin.It will create new wallet.dat Get an address from the new wallet, save it in notepad Encrypt the wallet with some passphrase you will remember for a long time Turn Bitcoin off Go back to your Bitcoin data directory Take the new wallet.dat and store it somewhere safe Move your old wallet.dat file back into the data directory Run Bitcoin again.

Send 8 Bitcoins to the address you saved in notepad Now you have two wallet files - one with 2 bitcoins for your normal use, one with 8 bitcoins for keeping them safe.Just make sure not to lose either of the two wallets, or you'll lose your coins.Keep your wallet.dats backed up and don't run duplicates at the same time.up vote 1 down vote /creating-an-offline-bitcoin-wallet/ Steps for creating an offline bitcoin wallet Open the folder that contains your wallet.dat file For Windows users: Go to Start -> Run (or press WinKey+R) and run this: %APPDATA%\Bitcoin For Linux users: By default you Bitcoin should be here: ~/.bitcoin/ For Mac users: By default you Bitcoin should be here: ~/Library/Application Support/Bitcoin/ Back up your wallet.dat file to a secure location Move your origional wallet.dat file out of this directory Start the Bitcoin client The Bitcoin client will automatically create a new wallet.dat file and a new address Copy the address and save it in notepad Encrypt the wallet with a secure passphrase Close the Bitcoin client Go back to the Bitcoin folder Move the new wallet.dat file out of this folder and store it somewhere safe.bitcoin é a moeda de qual pais

I suggest making multiple backups of this on multiple media types.CD, SD Card or a portable hard drive Move your old wallet.dat file back into the Bitcoin directory Run the Bitcoin client You can now send bitcoins to the address you copied down and they will be securely stored offline To get the offline wallet back online.Move out the existing wallet.dat file and replace it with you offline file.litecoin mining windowsOpen the Bitcoin client and you will now have access to the bitcoins associated with that wallet.bitcoin script stackup vote 1 down vote You better use off-line machine for generation secure bitcoin address.litecoin ppc(see vanitygen) Thereafter send your money from on-line machine to this address.bitcoin client fedora 20

Bitcoin now are safe.Nobody know your private key.up vote 0 down vote To save the copy/rename of your wallet.dat you could also use one of the alt-clients that have built in multiple wallet support.Both Armory and MultiBit show multiple wallets directly in the user interface.up vote 0 down vote It seems there's a more secure and easier method.bitcoin fy, print it off or memorize it or keep it on a USB flashdrive.Then he can go to his Bitcoin client, send 8 bitcoins to the public address of that newly-created private key and that will be most secure.Even if his client is hacked or PC crashes, those 8 bitcoins are damn secure.up vote 0 down vote Step 1: <-- Wiggle mouse, hit print.Step 2: client, send money, enter Bitcoin address, Qty 8 BTC.Browse other questions tagged wallet or ask your own question.How to Set Up a Split Bitcoin Wallet in Qubes What is a “Split” Bitcoin Wallet?

A “split” bitcoin wallet is a strategy of protecting your bitcoin by having your wallet split into an offline “cold storage” wallet and an online “watching only” wallet.A “Watching” Wallet and a “Cold” Wallet Create a Debian 8 backports template using the Qubes VM Manager or running qvm-clone debian-8 debian-8-backports in dom0.Add backports to the sources for the new template by opening a terminal in the new template, run sudo vi /etc/apt/sources.list and add deb http://http.debian.net/debian jessie-backports main.(If you are new to vi text editing, type i to be able to edit, and when done editing press ESC then type :x and press ENTER.)Update source list: sudo apt-get update.Install electrum from backports: sudo apt-get -t jessie-backports install electrum.shut down your debian-8-backports template create an offline-bitcoin qube based on debian-8-backports using the Qubes VM Manager or running qvm-create -t debian-8-backports -l black offline-bitcoin and qvm-prefs -s offline-bitcoin netvm none in dom0.

follow the electrum documentation in creating an offline wallet create a watching-bitcoin qubes based on debian-8-backports connecting to the internet how ever you prefer using the Qubes VM Manager or running for example qvm-create -t debian-8-backports -l green watching-bitcoin and qvm-prefs -s watching-bitcoin netvm sys-whonix in dom0.follow the electrum documentation in creating an online watching-only wallet Important Notes The private keys (xpriv) should never be moved outside of offline-bitcoin.For copying out the public keys (xpub), Qubes provides two secure, convenient methods: the inter-VM clipboard and inter-VM file copy tools.Compared to traditional physically air-gapped machines, these tools makes it very easy to copy out public keys.Safe Your private keys are encrypted and never leave your computer.Forgiving Your funds can be recovered from a secret phrase.Instant On Electrum is fast, because it uses servers that index the Bitcoin blockchain.

No Lock-In You can export your private keys and use them in other Bitcoin clients.No Downtimes Electrum servers are decentralized and redundant.Your wallet is never down.Proof Checking Electrum Wallet verifies all the transactions in your history using SPV.Cold Storage Keep your private keys offline, and go online with a watching-only wallet.Multisig Split the permission to spend your coins between several wallets.Add-ons Electrum supports third-party plugins: Multisig services, Hardware wallets, etc. Documentation Community Support IRC channel: #electrum channel on Freenode Report bugs, request features, help with development: electrum page on GitHub Localization: https://crowdin.net/project/electrum Forums As well as on Reddit Official announcements are made on Twitter Electrum Servers Server source code: ElectrumX (new, faster implementation) How to run your own Electrum server: Install Guide Servers list and status (Lists only Bitcoin Electrum servers) Statistics from Petrkr's server About Electrum Electrum was created by Thomas Voegtlin in November 2011.