The CARNet was always looking for better ways of secure data flow, and improving secure authentication and authorization procedures, so the PKI infrastructure implemented in CARNet network was a step of following that goal.
The aim of this paper is presenting non-commercial (free) open-source tool for establishing Public Key Infrastructure, and experience in integration of open-source PKI solution (OpenCA) in heterogeneous environments with Windows and Linux Operation systems and integration with smart cards for secure keeping of digital certificate and private keys.