18-05-2012, 11:36 AM
Security Policies of Sharing Health Care Data with Authentication and Authorization
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INTRODUCTION
The healthcare secretarial structure in all countries is naturally distributed, being a geographical spread of centers at different levels of difficulties: from the general hospitals down to individual physicians. The crucial objective of such a structure is to build a network of corresponding centers (For e.g., hospitals, laboratories, ambulatories, coordination centers, etc.) spread over the country, to meet effectively the social needs in the area. This necessary distribution makes it very hard for physicians to capture a complete clinical history of a patient, because a patient's health information may be spread out over a number of different organizations or different departments within the same healthcare institute.
EXISTINGMETHODOLOGIES
A dominant integration technology, which allows for immediate access to distributed information, is needed in order to provide healthcare institutions with a complete collection of patient information. A number of standardization proposals are progressing to address these interoperability problems such as:
a. HL7 (Health Level Seven) [1], a non-profit, ANSI accredited Standards Developing Organization, founded in 1987, that provides standards for the exchange, management and integration of data to support patient clinical care and the management, delivery and evaluation of health care services
MODERN TENDENCY TOWARDS SEMANTIC INTEROPERABILITY
All the suggestions for standardizing an application
protocol for the health care division may differ in the
progress achieved, but they are all similar in idea and
capabilities. All of them try to address the interoperability
problem by introducing a shared conceptual model (i.e.,
Ontology). This is very similar to the Semantic web services
method in which “semantic interoperability” is achieved by
modelling, at a conceptual level, web services and the
domain they are organized in [11, 12]. In all E-Health
standardization efforts, data structure and sequencing
information are improved with semantic information that
encodes the definition of each element of data including its
relationship with other elements.
SHARING HEALTH CARE DATA
As per the description in section II, the existing
methodologies in sharing health care data is achieved by
standard application protocols (For e.g., HL7, openEHR,
EHRcom and IHE), which define meaningful components of
the messages to be exchanged, and domain vocabularies
(e.g., SNOMED, LOINC, etc.), which define the meaning of
the data transported by each message. On the converse
TRSC enables communication via persistent magazine of
the information.