Last week, I tried to register for a service and was really surprised by a password limit of 16 characters. Why on earth yould you impose such strict limits? Never heard of correct horse battery staple?
this post was submitted on 18 Aug 2024
847 points (98.8% liked)
Cybersecurity - Memes
1975 readers
1 users here now
Only the hottest memes in Cybersecurity
founded 1 year ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
Modern cards have a chip inside them that’s basically a very tiny computer. It can check how many times the pin was incorrect.
That's pretty cool. I wonder what (if any) tinkering you can do with a card if you've got physical access and some very precise tools.
Even if you could you can’t recover the PIN from it. Since it’s not stored on the card, the chip checks the entered PIN against a secret key with cryptographic calculations if it is correct. But you can’t get the PIN from that secret key. Also if I remember correctly the chip will self destruct, as in wipes it’s data, when it detects that it’s being tampered with.
Good to know!