CLOSEDTALK encryption & asterisk?

CE-Infosys Releases New Version of its High Security VoIP Software - ClosedTalk

looks like a clone of phil zimmerman’s ZFONE to me…

anyone has played around with it seeing if it could work on asterisk?

No, ZFone provide security encryption on top of SIP & RTP protocols on 3rd party softphone. [ClosedTalk] need not any third party software for users to talk in privacy, it is a softphone with advanced security. In some ways the security concept might be little similar, but the implementation is different.