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.
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?
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