Access Client
Access Client provides a feature called Card Authentication Management (CAM), which enables sharing a user PIN among applications.
If CAM is enabled, after the user inserts a smart card in the reader and enters a PIN the first time, CAM caches the PIN. Applications that need to verify the user's identity can then get the PIN from CAM instead of prompting for it every time (up to the PIN timeout limit, if a timeout limit has been configured on the machine).