3 Dec 2013 In response to my last post on this topic, I've received a few requests to go into more detail about creating a cold storage wallet. Since you can't print the paper wallets from tails, you have to transfer the .pdf over to your normal operating system. This is What Most Likely Happened to MtGoxIn "Bitcoin".
You need to setup a persistence volume. Which will always remain on the USB and is unlocked with a pass code that the user picks. Tails comes installed with electrum bitcoin wallet. but if you wish you use other you need to download them from tor. Then once downloaded move them to your persistent volume so they don't
Your client does not download the blockchain. It uses a network of specialized servers that index the blockchain. Your wallet can be recovered from a secret seed. Your seed and private keys are encrypted on your hard drive. They are never sent to the servers. A great secure wallet.