The National Security Authority manages the GNS and is the entity that exclusively protects and safeguards classified information. The mission of the GNS is to ensure the security of nationally classified information and international organizations to which Portugal is a party, and to act as the accreditation authority of persons and companies for the access and handling of classified information, as well as that of accrediting authority. and supervision of entities operating within the State Electronic Certification System – Public Key Structure (SCEE).

EAD has NATO brand accreditation in NATO SECRET grade after GNS survey.

This process of verification and formal declaration act by the National Security Authority, certifies or certifies the suitability and reliability of distance learning to access, handle, hold and store classified information / material, with interest for the exercise of its activity.