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Using Electrum and Bootable Ubuntu USB to Create a Secure Cold Storage Wallet

Here is a short guide that is hopefully newb friendly for creating a cold-storage wallet with Electrum. All you will need is at least one USB flash drive with at least 2 GB of free space, your PC, and pen & paper.
You will need The Universal USB Installer, as well as the Ubuntu .iso image file. Choose the 32 bit version to be safe. Download both, plug in your USB flash drive, and launch the installer. Select Ubuntu in Step 1 in the installer. Then in Step 2 browse and locate the Ubuntu .iso image file you downloaded. Then in Step 3 select the drive you have inserted, as well as click the box to format the drive and erase contents. Do NOT set a persistence as this will reduce the security. Then click create and wait for it to finish.
Once booted into Ubuntu, make sure to click "try ubuntu". You are only trying it out on the USB, and not installing it onto your main hard drive. The reason for using the bootable drive is everything exists in memory and mostly disappears when you shut down Ubuntu.
(It would be more ideal to install electrum in a complete cold environment, but I have heard that could cause some problems with Electrum at this time and it is best to install it while connected to the internet. But if you want true cold storage you must have zero internet connection at the time of creating the wallet. Since we are disconnecting before Electrum creates the seed, we should be good.)
At this point you are done, just shut down Ubuntu to make sure the evidence of the seed is erased. Then you can send Bitcoins to your cold storage wallet. You have effectively created a very secure cold storage wallet, in my opinion. To restore the cold wallet, just launch electrum and choose "restore wallet" option, type in your seed, and voila you have a hot wallet ready to spend again.
Extra: Using Truecrypt Encryption
Bonus tutorial is if you would prefer to save your seed on another USB or digital device. It is not recommended to do this, unless the seed in encrypted. Even then I would only leave it on a USB and not plug it into any hot device just to be safe. I would recommend Truecrypt although its possible the NSA has hacked Truecrypt, so use at your own risk.
sudo add-apt-repository ppa:stefansundin/truecrypt
sudo apt-get update
sudo apt-get install truecrypt
Hit enter after each command. If it asks permission, press y. Sometimes I had problems getting commands to work in the past. For some reason first installing flash from the software center fixes the problem, but I have no idea why.
Choose a size for the file, probably 5 MB is enough, but by all means choose more if you want to hold more files. Click next and make sure to choose a SECURE password for the file. If you don't pick a good enough password it will be brute forced easily. Use numbers, letters, capitals, lowercase, symbols, and make it long as possible. Try to have it something you can memorize if possible. Then click next. Then format it as FAT, and click next. Move your mouse around for entropy and then click Format, and your truecrypt container has been created.
I think this is a decent easy to follow tutorial. Hopefully this can help some newbies out, if I made any mistakes please feel free to correct me.
Edit: Sorry formatting sucks.
submitted by btcfreedom to Bitcoin [link] [comments]

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