IAX encrypt + auth questions

Hi all,

I have found this feautures for IAX trunk

encryption
voip-info.org/wiki/view/IAX+encryption

and for auth
voip-info.org/wiki/index.php … x+rsa+auth

Are these stable and realy secure ? Is best use IAX over vpn tunnel ?

Is possibile use this with a iax client (softphone - hardphone) ?

LL