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Rule-based Systems Programmability

Rule-based Systems Programmability. Michael Smirnov smirnow@fokus.fraunhofer.de. Roadmap. What‘s a rule-based system? Behaviour definitions: safe and secure Run-time updates Self-organisation of rule-bases Impacts and new architectures. What‘s RBS?.

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Rule-based Systems Programmability

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  1. Rule-based Systems Programmability Michael Smirnov smirnow@fokus.fraunhofer.de NeXtworking’03 June 23-25,2003, Chania, Crete, Greece The First COST-IST(EU)-NSF(USA) Workshop on EXCHANGES & TRENDS IN NETWORKING

  2. Roadmap • What‘s a rule-based system? • Behaviour definitions: safe and secure • Run-time updates • Self-organisation of rule-bases • Impacts and new architectures NeXtworking’03 June 23-25,2003, Chania, Crete, Greece The First COST-IST(EU)-NSF(USA) Workshop on EXCHANGES & TRENDS IN NETWORKING

  3. What‘s RBS? • RBS behaviour is defined by openly exposed rules rather than by ‘hidden’ state transitions (as in client-server) • RBS is typically a control plane implementation that controls invocation of Functional Primitives (FP), it has zero functionality • RBS is typically securing FP invocation, we want to make RBS securely programmable Rules Rules BD Events Rules Rules Events Client-Server Messages e.g. midcom FP FP Data traffic NeXtworking’03 June 23-25,2003, Chania, Crete, Greece The First COST-IST(EU)-NSF(USA) Workshop on EXCHANGES & TRENDS IN NETWORKING

  4. Common framework Service Domain (SD) Behaviour Definition Design SD Component SD Component request (T,a) BA+ | Ob (a) Su | BO+ EAA EAS Security Policy Design M | NO+ M | NO+ Monitoring Policy Design Legend: Su - subject, Ob – target object; M – montor; BO – behaviour obligation; BA – behaviour authorisation; EA – event authorisation; NO – notification obligation NeXtworking’03 June 23-25,2003, Chania, Crete, Greece The First COST-IST(EU)-NSF(USA) Workshop on EXCHANGES & TRENDS IN NETWORKING

  5. Safe and secure behaviour updates • Ruling behaviour • Filtering, classification, SLA conformance, etc. • Can we also define new behaviours for run-time service creation? • Programmability: • Creation of new services • Service: A Logical Element that contains the information necessary to represent and manage the functionality provided by a Device and/or Software Feature. A Service is a general-purpose object to configure and manage the implementation of functionality. It is not the functionality itself [DMTF] • Responding to the unexpected • Designing security policies and a framework for policy management that will allow necessary access to systems and data in previously unplanned ways, and by persons and systems not normally permitted to do so[URL http://crue.isi.edu/research/report.html] NeXtworking’03 June 23-25,2003, Chania, Crete, Greece The First COST-IST(EU)-NSF(USA) Workshop on EXCHANGES & TRENDS IN NETWORKING

  6. Run-time updates • Need to change rule-base at run-time • Conflicts with already installed rules • Feasibility conflicts • Local and global conflicts • Possible approach: conflict resolution rules • Convention? Yes, but allowing proof-based engineering • Automatic conflict resolution is possible • Do we need to chnage the world? • Need also to detect and resolve automatically rules violation • Rule-base auditing! NeXtworking’03 June 23-25,2003, Chania, Crete, Greece The First COST-IST(EU)-NSF(USA) Workshop on EXCHANGES & TRENDS IN NETWORKING

  7. Self-organisation • The need to have high performance of rule bases • E.g. rule heaps optimised for usage frequencies • Rule injector has to be synchronised with a rule-base • Rule life-cycle management is not feasible • Too many potential rule injectors • Want to have a radically distributed system • Theory does exist (e.g. Adaptive Huffman, FGK) • Need negative modalities for rules • Security and safety: • Fine grained access control: • Event authorisation • Behaviour authorisation and obligation • Notification authorisation NeXtworking’03 June 23-25,2003, Chania, Crete, Greece The First COST-IST(EU)-NSF(USA) Workshop on EXCHANGES & TRENDS IN NETWORKING

  8. Impacts and new architectures • Even more promises in non-conventional infrastructureless networking • wireless sensor, ad hoc, ‘ambient’ networking, etc • New architectures: role-based architecture (RBA) • Role as a network service, controlling FP • event-action type of reasoning • role-based addressing • group communication within network control plane NeXtworking’03 June 23-25,2003, Chania, Crete, Greece The First COST-IST(EU)-NSF(USA) Workshop on EXCHANGES & TRENDS IN NETWORKING

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