Quote from: Zeek_W on September 12, 2013, 12:56:09 AM

Quote from: grue on September 12, 2013, 12:04:57 AM

Quote from: BurtW on September 11, 2013, 10:36:20 PM

So yes, you could flip a coin 256 times and copy down the results into a 256 bit number and as long as your number is less than the (prime) number p shown above it is a valid private key.

A coin is a really bad source of entropy though.

Use 512 coins, and drop them from a height. Unleash a dog/kid into the room to scatter and or lose some coins. Then pick up 256 coins randomly Grin

I did say "valid", not "good" or "random" or "secure".

Still, flipping a coin 256 times and then directly using the value obtained would be much better than using "stfu!" as your pass phrase to a brain wallet Wink