NXP tried to stop the publication of the article that describes the weakness by requesting a preliminary injunction. Some people even speculate that NXP has built in a backdoor into Mifare Classic cards because it so incredible easy to crack them. This card had horrible misdesigns and the encryption is so weak that these cards can be cracked in less than one minute. Normally these cards cost half a dollar)īut as you can read in Wikipedia and elsewhere Mifare Classic has been broken in 2007. (By the way: Your price is very high with $2,50. The only cards you sell are Mifare Classic. I would like an explication why Adafruit does not sell Desfire EV1 cards ? I wanted to post this in the forum "Administrative" but there the button "Post a Topic" is missing.
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