identity standards - damon berry
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Damon BerryDamon Berry
HISI 2011
Health Identity Standards and Specifications
TeaPOT, School of Electrical Engineering Systems, DIT. http://teapot.dit.ie
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Introduction
• Some identity definitions• Demographics models / trait sets• Standards for identity matching• Gaps in standardisation
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Matching concepts
EN13606
Access Control (PMAC)
entity
principal
policy
document
role
act
authentication
Policy management
authorisation
audit
Privilege management
Principal management
Access control management
“entity”
attester
subject
committerIXSentity
…
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Identity Domain
Identity (trait set +,…)
Background terms
• Definition– Identifier– Trait– Identity– Identity domain
Identifier
Identifier
Trait
Trait
Trait
Trait
Trait Trait
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Primary identifiers – assigned at a national
level
• Individual Healthcare Identifiers (IHIs)
• Healthcare Provider Identifiers – Individual (HPI-Is) assigned to healthcare professionals
• Healthcare Provider Identifiers – Organisation (HPI-Os) assigned to organisations where healthcare is provided.
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Demographics models
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Identity cross reference service(OMG/HL7)
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Standardised trait sets for people and organisation
ISO/TS 22220:2009 Health Informatics -
Identification of subjects of health care
ISO/TS 27527:2010 Health informatics -
Provider identification
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EHRcom Demographics Model
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Commonly occurring features in demographic
models
• “Identified entity”
• Data types
• Trait – trait part
• Validity time
• Role
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Gap 2 - Identity of other types of entities
• Samples / specimens
• Orders
• Episode
• Instrument (there already)
• Omic entities
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Secondary identifiers in the EHR
• Lab number
• Sample / Specimen Number
• Order Number
• Episode ID
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Gap 3: turning local identifiers into global ones(just to uniquely identify - not to link
entities)
Three approaches
• OIDS
• UUIDs
• URIs
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ISO Object Identifiers (OIDs)
• a standardised identification scheme. • developed in 1985 now widely used in the standards
community. • Each OID forms a node in a tree. • The arcs (edges or branches) between nodes in tree are
numbered and can also be associated with an alphanumeric identifier.
• Some examples of different OID notations.– Numeric form 2.16.382.1 – Alphanumeric form {joint-iso-itu}.{country}.{ire}.{organisation}.– URN notation urn:oid: 2.16.382.1 – IRI notation oid:/joint-iso-itu/country/ire/organisation
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OIDs
ISO-ITU
IRE
HSE HRB CSOESRI
Acute Care PrimaryCare
Patients HCPs Pharma
SJH
AMNCH
Parklands MC
Beamont MC
UHIC. 123 UHCP. 123
5 million3,000800 120,000
Snomed-CT
Drug A
??
Drug B
International OIDs
National OIDs
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National OID repositories
• Germany
• Switzerland
• Spain
• United Kingdom
• Norway
• … using Excel.
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A better way, OID Resolution Protocol
• The OID resolution protocol (ORP), defined in a IEC work item will define the interaction between– OID resolution client which sends an OID as
part of a request and – OID resolution server which returns the OID
information available at the corresponding node in the tree.
• Similar to the Domain Name Service.
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UUID Universally Unique Identifier
• Formed by a series of 16 octets or a total of 128 bits or 32 hexadecimal digits (often separated in groups of four).
• A new unique UUID could be created every 100 nanoseconds on every internet machine for the next 1600 years.
• UUIDs can be registered in an OID registry. For example the OID 2.25 has been reserved as a registration authority for UUIDs.
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Scope of the three types of unique
identifiers
.
URIs
UUIDs OIDsRegistered
UUIDs(in OID
repository)
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URI or Uniform Resource Locator
• A string that identifies a name or internet resource. There are two types of URI and a resource can be addressed by both types simultaneously.– URL (Uniform Resource Locator) is a widely used
type of URI that identifies and provides a means for retrieving an internet resource.
– URN (Uniform Resource Name) is a mechanism for naming or finding a resource and associating meta-information with a name. The presence of a URN for a resource does not necessarily imply that the resource is available. A URN can be used to represent an OID. The joint ISO-ITU OID for Ireland in URN syntax is
– urn:oid:2.16.382
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Thank [email protected]