I don't know how openvpn does session key negotiation but unless they're careful they may wind up exposing aes-256's 2^99-level-security related-key attacks. aes-128 is probably fine for the control channel and doesn't have the same related-key issues.
Wow, this is really depressing.
I don't know how openvpn does session key negotiation but unless they're careful they may wind up exposing aes-256's 2^99-level-security related-key attacks. aes-128 is probably fine for the control channel and doesn't have the same related-key issues.
Thanks