Health data are considered as personal and sensitive. The storage, process, access and communication of health data through health information systems, require appropriate methods that will ensure their privacy, confidentiality, integrity and other aspects of security. Methods to provide security are part of most computer systems, but healthcare systems are distinguished by having especially complex considerations for the use and release of information. Availability, accountability, authentication, authorization, perimeter definition, role-limited access control are key functions that need to be considered, Different types of information kept in the health care records have different rules for release, as determined by laws and by institutional policy following legal and ethical considerations.