Quote Originally Posted by User137 View Post
256-bit encryption is still nowadays secure. In computer theory it's quantum computers that some decades later may revolutionize decryption, but modern supercomputers can't do it.
Yes, but you need to consider what type of data is being encrypted. For large text documents of unpredictable data - sure, it's pretty secure. Now consider credit card number, which uses only 16 digits (which itself fits only in 128-bit block), some of which can be easily guessed using regional information from the user. You don't need even a super computer to crack this. Yes, there are ways to make it more secure by adding random data and such, but as I said before, I doubt they even use encryption in the first place, let alone other advanced techniques.

Quote Originally Posted by User137 View Post
It even uses GPU power to greatly utilize all the power computer has for MD5 hash cracking. If you assume that word is only 1..8 characters long (256-bit would mean 32 characters) and only contain small letters from a..z it will take many hours. Now add numbers and big letters in the force and it'll take forever...
On your integrated Nvidia card... sure, it may take some time. But have you tried running it on more serious personal computer or nice entertainment system?