Yeah - there's even some fairly capable "cloners" available on eBay for most of the common formats. I guess that the ongoing use of (derived from magnetic stripe) Wiegand interfaces mean that most can be cloned like this.
There are absolutely some unclonable (without massive expenditure on defeating CC EAL 5+ smartcards) access control systems, but those are never the cheapest, so they don't get adopted outside of (very) high security environments.
I wondered if we'd see a shift once the Flipper Zero hit the ground, but it's probably still a bit too early on that.
A lot of hotels used to use insecure (and pretty easily cloned with an Android app) Mifare Ultralight NFC on room keys, but I've not seen one of those recently - most seem to be Mifare classic now, which is secure if your keys aren't compromised.
There are absolutely some unclonable (without massive expenditure on defeating CC EAL 5+ smartcards) access control systems, but those are never the cheapest, so they don't get adopted outside of (very) high security environments.
I wondered if we'd see a shift once the Flipper Zero hit the ground, but it's probably still a bit too early on that.
A lot of hotels used to use insecure (and pretty easily cloned with an Android app) Mifare Ultralight NFC on room keys, but I've not seen one of those recently - most seem to be Mifare classic now, which is secure if your keys aren't compromised.