Summary: A security credential that maintains its own tamper-resistant forensic history of where and when it has been used, allowing independent verification against system logs to detect cloning, misuse, or unauthorized readers.

Can be sized as standard access card (likely thicker with secure log handling)
Not readable with magnetics
Fixed and randomized access/security key(s) from production or programmable
Durable long-term storage for keys and codes
Internal log storing for example reading device id's and time stamps
  Protected and tamper safe (e.g. writing of internal log handled by the device itself)
  Internal logs can be compared with system logs upon reading (to detect unauthorized use/copying)
  System can detect and warn for device having been accessed by unknown readers/copiers
  System can detect and warn for readings at non normal hours (e.g. outside of working hours)
  System can detect and warn for excessive readings in a day (e.g. one more than expected)
  System can detect and warn for erased/tampered with internal log
Can be produced with chip or connectors protected by slider (opened by reader)

my own thoughts on applications:
  building/room security
  system keys/codes/certificates
  machines/vehicles/installations with high security requirements

2026-07-28 Edit: Added Summary