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Handle System Namespace and Service Definition

Handle System Namespace and Service Definition. Sam X. Sun ssun@cnri.reston.va.us http://www.handle.net. Agenda. Design Objective Namespace Definition Data Model Service Model Protocol Model Handle System and DNS Handle System and X.500/LDAP. HS Design Objective.

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Handle System Namespace and Service Definition

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  1. Handle System Namespace and Service Definition Sam X. Sun ssun@cnri.reston.va.us http://www.handle.net

  2. Agenda • Design Objective • Namespace Definition • Data Model • Service Model • Protocol Model • Handle System and DNS • Handle System and X.500/LDAP

  3. HS Design Objective • Uniqueness, Persistence, Extendable • Scalable, Distributed Service Model • Secured Name Service • International Support • Distributed Administration Service • Efficient Resolution Service

  4. HS Namespace • Handle Syntax <naming authority> / <local name> where each NA represent a local namespace. • Example: 10.1045/january99-bearman cnri.test/my-test-handle

  5. HS Data Model Each handle can be assigned with a set of value records, at least one of them defines its administrator. For example, cnri.test/my-test-handle

  6. Handle Value Record Index identifies the value record type a UTF-8 string, registered as handle data handle data, preceded by its length TTL relative/absolute permission public read/write, admin read/write timestamp for administration/caching purpose reference list of handle value references (for added credential)

  7. Handle Admin Record - HS_ADMIN adminRef refer to another handle value record adminPermission - add/delete naming authority - add/delete handle - add/delete/modify handle value - add/delete/modify administrator

  8. Handle System Service Architecture

  9. HS Service Delegation Global Handle Registry Local Handle Service Local Handle Service …... (e.g. CNRI) Local Handle Service (e.g. ETSI) (e.g. DOI) • Global Service manages namespace registration in terms Naming Authority (NA). • Local Service manages names under registered NAs.

  10. HS Service Distribution A Handle Service (Global/Local) configuration example: M a i n F r a i m NT1 NT2 Sparc1 Sparc2 NT3 NT4 Site 2 Site 1 Site 3 • Service sites replicate each other for load balancing. • Add more servers per site to support ever growing namespace.

  11. Service Definition: HS_SITE Record version identifies HS_SITE info format serialNo identifies its data version primaryMask primary/secondary/multi-primary hashOption by handle/local name/NA attributeList description, ... ServerList { list each server at the site} <serverID, address, public key, transmission protocol, port number> … ...

  12. Handle Protocol Model Envelop + Header + Body + [ Signature ] where envelop - defines version and other options header/body - requests/response data signature - covers header/body only

  13. Handle Protocol Model (cont.) • Client queries the Global Handle Registry for responsible local handle service • Global Handle Registry returns the service information, signed if required • Client sends service request to the local handle service • Local handle service sends response to client, performs authentication if necessary

  14. HS Authentication Protocol • Client sends service request • Server issues challenge if authentication is required • Client returns response to the challenge plus the administrator reference • Server perform request upon successful authentication

  15. Handle System and DNS • Different Naming Structure. (URL like) • More scalable service model in terms of multiple servers for any service site. • Access control model that allow distributed administration. • Namespace I18N. • Independent Name Service that will not conflict to network address translation.

  16. Handle System and X.500/LDAP • Simple data model at any service site v.s. hierarchical data model used by X.500/LDAP. • Simple/quick resolution service v.s. complicated search/query. • May work together to compliment each other.

  17. References • Handle System home page: • http://www.handle.net • Digital Object Identifier (DOI) • http://www.doi.org • IETF drafts • draft-sun-handle-system-03.txt • draft-sun-handle-system-def-01.txt

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