I'd like to generate a few bitcoin addresses for a paper wallet.
I tried www.bitaddress.org
, it works fine but since I'm paranoid after reading this:https://bitcointalk.org/index.php?topic=93129
perhaps I should generate my own private key and use bitaddress.org offline only to generate the associated bitcoin address (public key).
I'm using linux.
How about this:
boot up a linux distro from an usb stick without going online.
move the mouse and type on the keyboard for a couple of mins to feed /dev/random with entropy
read 32 bytes (256bit) from /dev/random
head -c 32 /dev/random | xxd
which dumps the 256bit sequence in hex format.
go to the bitaddress.org page's Wallet Details and enter your private key in hex format so that you get the associated public key (bitcoin address).
Write down on paper both public key and private key.
Turn off the computer.
Or should I take the output from /dev/random and XOR it byte by byte with a long passphrase ? I guess if /dev/random works well then the additional XOR does not
Is there an alternative method to generate the public key (bitcoin address) from the private key by using a tool in C ? or by using the official bitcoin client?
If yes how?
Please let me know if the above method is regarded as very secure.
thanks for your suggestions,