RSA is an asymmetric key system. It must be available on both sides of the IPSec connection and generates on each side a different pair of keys, a private key and - deduced from that private key - a public key.
During the connection initiation some data is encrypted with the remote's party public key and can be decrypted with his private key by himself and vice versa.
Then each side encrypts its data with its own public key but needs both, the remote public key and the own private key to decrypt the received data. As the private key is never transmitted in any way, it stays completely unknown for everybody. The system keeps being save, even if somebody checks out the public key: He cannot decrypt the data without the private key and can't send data without knowledge of the private key either.
Quadro generates such a pair of keys automatically when it is set up. You won't see the private key, but you have to know the public key as your IPSec Connection partner will need it. Clicking the RSA Key Management button on the IPSec Connection configuration page where the public key is displayed in the RSA Public Key text field, so you can inform your IPSec Connection partner about it e.g. via fax.
You are able to
create new RSA keys.
Attention:
A pair of keys will always be generated, a public one and a private one. The previously generated pair of keys will become invalid as well as all existing IPSec connections that use RSA keying.