How Secure Is This?

• Expected 2^(1+58+7-1) = 2^65 calls to SHA-512 to crack.
• SHA-512 is more expensive than SHA-1 to compute
• At current difficulty, 2^31*1866391.3 hashes on average to get 50 Bitcoins
• 1 Bitcon ~ $8.52 dollars
• SHA1 costs about 508.52/(2^311866391.3) dollars, or roughly 2^(-43) dollars
• Password will require 2^(65-43) = 2^22 or roughly $4 million to crack.
• Upgrade to a 5-word passphrase, for $100 billion to crack.