Researchers have recently demonstrated that concealing the PIN pass with the other hand is not a sufficient method to defend it against deep learning-based attacks.<\/p>\n\n\n\n
This was demonstrated by an experiment with a special deep-learning algorithm that can guess four-digit card PINs 41% of the time.<\/p>\n\n\n\n
For the experiment, the researchers collected 5,800 videos when 58 different people entered 4-digit and 5-digit PINS with a machine (Xeon E5-2670 with 128GB of RAM and three Tesla K20m with 5GB of RAM each) to run the prediction model.<\/p>\n\n\n\n
Using three tires, the maximum allowed number of attempts before the card is retained, the researchers reconstructed the correct sequence for 5-digit PINS 30% of the time and reached 41% for the 4-digit PINs.<\/p>\n\n\n\n
Countermeasures that should be taken to mitigate such an event include a 5-digit PIN, which seems to be more secure against such attacks, full hand coverage, which can help reduce the accuracy of the attack to 0.33, and a third measure is to offer users a virtual keypad instead of the standardized mechanical one.<\/p>\n\n\n