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Policy-Driven Systems for Enterprise-Wide Security

Policy-Driven Systems for Enterprise-Wide Security Using PKI and Policies to build Trusted Distributed Authorization Systems Joe Pato Marco Casassa Mont Hewlett-Packard Labs Sep 18, 2000. Enterprise. User. B-2-B. Internet. E-Services. Service Provider. Business Model.

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Policy-Driven Systems for Enterprise-Wide Security

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  1. Policy-Driven Systems for Enterprise-Wide Security Using PKI and Policiesto buildTrusted Distributed Authorization Systems Joe PatoMarco Casassa MontHewlett-Packard LabsSep 18, 2000

  2. Enterprise User B-2-B Internet E-Services Service Provider Business Model Business-to-Business Relationships betweenService Providers and Enterpriseson the Internet

  3. Requirements Trust Management • Establishment • Sustained Relationship • Privacy • Enterprise Population • Individual’s Roles • Customization • Local Policies • Enterprise Enforcement

  4. Requirements Performance • Distributed Processing • Services • Policy Enforcement • Authorization • Bandwidth Consumption • Reduced • Amortized

  5. Current Business Model Service Provider E-Services Operation Enterprise • Service Provider Policies • Business Constraints • Local Configuration Operation Operation User B-2-B Operation Operation Internet Policy Enforcement Point (PEP) Authorization Service

  6. E-Services User Operation Operation Operation Enterprise Policies Authorization Service Operation Operation Policy Distribution Point (PDP) Policies Policy Enforcement Point (PEP) Moving TowardsHigh Level Symmetric Business Model Enterprise Service Provider Internet • Service Provider Policies • Business Constraints • Local Configuration B-2-B Authorization Service Policy Enforcement Point (PEP) Policy Distribution Point (PDP)

  7. Distributed Authorization • Policy Driven Authorization • (A)Symmetric Authorization • Operation at both parties • Policy Distribution Points • Distribute across enterprises • Policy Enforcement Points • Both local and remote policies

  8. Business Model Simplifications • Sustained Relationships • Contracts • Auditing and Monitoring • Dispute Resolution

  9. Technology Problems • Trust Establishment • Tamper Resistant Policy Enforcement Point • Verifiability of Identity of Involved Parties • Verifiability of Policies sent across Enterprise Boundaries • Instrumentation to Gather Evidence • Archival of Evidence

  10. Role of PKI • Verifiability for Business Relationships • Digital certificates • Certificate management • “Tamper Proof” exchange of messages and policies • Signed XML

  11. Policies • Statements describing expected behavior for • Systems • Services • People • Formal Modeling • High Level Specification • Refined to programmatically enforceable data • Abstraction suitable for sharing across enterprises

  12. Role of Policies • Policies • Describe authorization constraints • Drive authorization decisions • Are exchanged between Enterprises in a Distributed Authorization Framework

  13. Conclusion • Distributed Authorization enhances privacy and performance for B2B interactions < www.hp.com/security >

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