This is the third Technical Safeguard Standard of the HIPAA Administrative Simplification Security Rule. It has one implementation specification: mechanism to authenticate electronic protected health information. This implementation specification is addressable. Addressable does not mean “optional.” Rather, an addressable implementation specification means that a covered entity must use reasonable and appropriate measures to meet the standard. As we have noted in earlier postings on HIPAA.com, business associates of covered entities will be required to comply with the Security Rule safeguard standards, beginning February 17, 2010. This requirement is one of the HITECH Act provisions of the American Recovery and Reinvestment Act (ARRA), signed by President Obama on February 17, 2009….