eToken Pro (4.2.5.x) : eToken PROÃ?Â¢??s secure, on-board RSA 1024-bit and 2048-bit key operations enable seamless integration into Public Key Infrastructure (PKI) architectures. eToken PRO can generate and store usersÃ?Â¢?? personal credentials, such as private keys, passwords and digital certificates, inside the protected environment of the smartcard chip itself. UsersÃ?Â¢?? private keys never leave the token.