The pam_rsa pam-module (also known as "poor man's smartcard") is for local pam-authentication with rsa keypairs. it cannot be used for authenticating to pam-services on remote hosts. the basic idea is that rsa private keys are stored on removable and easily portable medias like usb memory sticks. this package provides the pam-rsa.so module for pam.

homepage: http://www.helsinki.fi/~vmkari/pamrsa/