1. Objectives Keep network activity anonymous and unobservable Provide QoS-guaranteed communication services Be upward and downward compatible with existing operating systems, applications, and network technologies Be scalable and evolvable

2. Approaches Traffic camouflaging: host-based rerouting and traffic padding based on real-time traffic modeling theory. Real-time communication: providing end-to-end delay guaranteed services to applications while having traffic camouflaged A middle-ware solution: achieving effectiveness, compatibility, and scalability

3. NetCamo System Architecture TCPCORBA Internal Method invocationSNMP/Telnet/COPS NetCamo Network Controller DeviceIOctl Data Transmission Host Agent Router Agent NetCamo Traffic Manager Router API API Host Manager Client Applications Traffic Controller H323H323 NetCamo Host Controller API API Host Manager Client Applications Traffic Controller H323H323 NetCamo Host Controller Host Network

4. Status April 2000: Pre-release version * Support both CBR and VBR traffic * Support a fixed cover mode * Support a fixed sensor period for traffic padding * Support real-time monitoring July 2000:  version: * Support multiple cover modes * Support an adaptive sensor period for traffic padding * Support a semi-automatic traffic modeling tool October 2000: Version 1.0 * Provide installation and maintenance services December 2000: Integration with HiPer-D system

5. NetCamo Traffic Manager

6. NetCamo Host Implementation Traffic Controller

7. NetCamo Testbed

8. NMNM RA OG 1.AR H.323 TCP 2.AR 16.Y/N H.323 17. HA RAHA ERER CAC NeM TP HMHM TCTC 3.AR 4.AR Corba 5.CR 6.AR 7.Y/N 8.Y/N 9. TPL 10.NMU 14.Policing Corba Telnet 12.Policy Corba 13.Y/N 11.Y/N 15.Police Client Admission Request Processing NM: NetMeeting, OG: Gatekeeper, HM : Host Manager, TC: Traffic Controller, HA: Host Agent, RA: Router Agent, ER : Edge Router, CAC : Connection Admission Control, TP: NetCamo Traffic Planner, NeM: Network Monitor, TPL: Traffic Plan