Dynamic Access Control Infrastructure for On-demand Provisioned Cloud Services

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1 Dynamic Access Control Infrastructure for On-demand Provisioned Cloud Services Canh Ngo SNE Group, University of Amsterdam OGF-ISOD 33 September 19-21, 2011 Lyon, 2011

2 Agenda Introduction Scenario Motivation Proposals on Security Infrastructure for Ondemand Provisioned Cloud Services Security Reference Model Trust Relationship Model Dynamic Access Control Infrastructure Implementations Summary 2

3 Introduction Scenario Virtual security domain Company A Cloud IaaS Multi-provider Multi-tenant Service Lifecycle Management Company B Company C Cloud Provider 1 Cloud Provider 2 Virtual Resource from Cloud Prov 1 Virtual Resource from Cloud Prov 2 3

4 Introduction Motivation Security context management issues: Integrate with service lifecycles Context delivery and synchronization of isolated operations among multiple tenants Binding end-users operations to separate customers/tenants Trust Management Trust model proposal Trust establishment protocols: establish trust-path/trust-chain between end-users and virtualized resources through supply-chain of providers Bootstrapping protocols for trusted virtualized devices Identity and Access Control Management Authorization policy management: synchronization of policies & reconfigurable resources Identity management, access control Support for virtual security domains across multiple Cloud providers Delegation: Security services/tools delegation for customers/tenants 4

5 Security for On-demand Provisioned Cloud Services Security Reference Model Common Security Service Interface (CSSI) proposal Common Security Service Layer Dynamic Access Control Infrastructure (DACI) proposal Trust model proposal, trust establishment protocols, bootstrapping processes Authentication & Identity Man. Trust Management (Dynamic trust establishment, Bootstrapping) SLA Management Authorization & Policy Man. Security Context Management Security Service Lifecycle Management (SSLM) 5

6 Security for On-demand Provisioned Cloud Services Trust Relationship Model Trust model using cryptographic-based with trust transitivity VIO1 VIO2 Building trust-paths from end-users to virtualized resources Trust-path establishment protocols Bootstrapping for trusted virtualized resources Dynamic Security Association PIP1 VIP1 VIP2 VIP3 PIP2 PIP3 PIP4 PIP: Physical Infrastructure Provider VIP: Virtual Infrastructure Provider VIO: Virtual Infrastructure Operator Static trust link Dynamic trust link Virtual Resource End-user 6

7 Security for On-demand Provisioned Cloud Services Dynamic Access Control Infrastructure Common Security Service Interface (CSSI) SecurityGateway Consolidate a common interface to access security services DACS instance[i] DACI Management Authentication Authority SAML-XACML Layer Authz-token Svc DACI Configuration DACI Monitoring Attr DB Attribute Authority Identity Management Service PIP (Authz Ctx Hdlr) PDP Obligation Handler PAP Authorization Service Authz-token Authority Authz Token Service DACS Man. Service DACI Policy Management DACI Context Management DACI Trust Management DACS Trust Manager Provisioned security services (DACS) DACI: Dynamic Access Control Infrastructure DACS: Dynamic Access Control Services Update authz-policies upon reconfiguring Virtual Infrastructure Dynamic Trust Establishment: DSA, Bootstrapping 7

8 Implementation GAAA-ISOD Toolkit Library Features Dynamic authorization policies: auto generate XACML authz-policies by predefined templates PEP: Common Security Service Interface (CSSI): facilitate integrations of virtualized security services to resources Security token service: XML-based AuthzToken & AuthzTicket, persistent caches, digital signatures Authentication (SAML, X.509, User/Password) Authorization (PDP, PEP, PAP) Security Token OpenSAML SunXACML BouncyCastle (Java crypto library) 8

9 Implementation GEYSERS Project Based on GAAATK-ISOD toolkit WP3-dev: Logical Infrastructure Composition Layer (LICL) FUSE ESB env, OSGi bundles Packages: AAI (AuthN/Z for LICL, NCP+), DACI (AuthN/Z provisioning for Cloud IaaS) WP4-dev: NCP+ AAI web services SecurityGateway AuthnSvc AuthzSvc TokenSvc DACI Policy Man. DACI Man. DACI Trust DACI Context DACS AAI for LICL (eu.geysers.licl.aai.*) DACI GAAA-ISOD Toolkit 9

10 Implementation DACS Integration using SecurityGateway library Isolate tenants/subscribers by Reservation Id (VI-GRI) CSSI Client VR service CSSI CSSI/GAAPI Policy Enforcement Point SecurityGateway Library AuthN AuthZ TokenSvc Identity Management Service Authorization Service DACS instance Security Token Service 10

11 Summary Future work Trust modeling across virtual security domains SSLM bootstrapping protocols for virtual devices: Trusted Computing Platform Architecture (TCPA) Trusted Platform Module (TPM) Federated virtualized Identity and Access Control Management GAAA-ISOD toolkit implementations with SSLM supports for on-demand infrastructure services provisioning 11

12 Thank you Any questions? 12

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