[Freeswitch-dev] FreeSwitch and simple encryption

Hello, I wish to implement some simple encryption stuff into FS. My Idea: Imagine, some clients who have SIP softphone with encryption (My own method and only SIP signaling packets will affected) will interconnect with FS. So, FS must decrypt this packets before proceed it and encrypt before sent to this client. Could anyone direct me to easy way to implement it? Thanks Dmitry