Is it convenient to talk at the moment? <a href="http://al-saudia.pk/index.php/pharmaregs-ltd-ijum">pharmareg consulting</a> Over the past two years, Nohl has tested his method on around 1,000 cards across North America and Europe. DES is used in around three billion mobile SIMs worldwide, of which Nohl estimates 750 million are vulnerable to the attack. Many carriers use SIMs with the stronger triple-DES encryption method, which are not susceptible to Nohl's method, and DES in general has been phased out in favor of AES (Advanced Encryption Standard).