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Reflections on Active Network Trust OpenArch Panel, March 26th, 1999

Reflections on Active Network Trust OpenArch Panel, March 26th, 1999. Jonathan Smith University of Pennsylvania http://www.cis.upenn.edu/~jms. Inspiration: Ken Thompson Turing Award Paper. “Reflections on Trusting Trust” Example of self-replicating compiler virus

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Reflections on Active Network Trust OpenArch Panel, March 26th, 1999

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  1. Reflections on Active Network Trust OpenArch Panel, March 26th, 1999 Jonathan Smith University of Pennsylvania http://www.cis.upenn.edu/~jms

  2. Inspiration: Ken Thompson Turing Award Paper • “Reflections on Trusting Trust” • Example of self-replicating compiler virus • Lesson: You are trusting infrastructure! • A.N. concern so far: trust of code • Can the code trust the A.N.? • Goal in an A.N.: • Either operate in untrusted environments • Or establish web of trust

  3. A.N. Internode Interoperation Application 3 Application 4 Application 1 Application 2 Application 1 Application 3 Execution Environment (e.g., ALIEN) Execution Environment (e.g., ANTS) Execution Environment (e.g., ALIEN) Execution Environment (e.g., ANTS) Node Operating System #1 (e.g., Nemesis, Linux) Node Operating System #2 (e.g.,Scout, NT) Transmission Facilities

  4. Strategies for paranactive nets • Carry all code with you in a capsule • how do you load your code? • Telescope out trust relationships with cryptography and identities • need to think about ad-hoc relations • Pre-establish trust relationships and verify at node

  5. Example: SwitchWare Architecture PLAN Packet Caml Switchlet PLAN Packet Caml Switchlet PLAN ALIEN Library Dynamic Integrity Checks Node-Node Authentication ALIEN/Caml/OS AEGIS Static Integrity Checks Recovery

  6. Trusted Repository Active Network Env. Level 4 Boot Block Level 3 Expansion ROMs BIOS 2 Network BIOS 2 Level 2 BIOS 2 Level 1 Netcard BIOS 1 Level 0 Arbaugh’s AEGIS Architecture

  7. Result: E.E. in known state, but… • Still trust some hardware • Also trust repository for recovery • Need basis, like diplomatic pouch containing a one-time pad • Applications aware AEGIS executed? • Can applications know that system integrity has been preserved?

  8. Some (maybe crazy) ideas: • Allow paranactive applications to invoke AEGIS with themselves as target… • Awful performance, poor multiplexing :-) • Paranactive applications “disarm” gradually (gradually expose more code and credentials as environment is checked) • Automated Trust Management (need new acronym - “third rail” of nets!)

  9. Tools and Needs • AEGIS: http://www.cis.upenn.edu/~waa • Trust management infrastructure • Penn/AT&T work on Keynote • Scalability is a challenge • Need paranactive application examples • Intrusion detection and response? • Mapping and monitoring?

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