The receipt and protection of foreign classified information in the Republic of Estonia is the function of the Estonian National Security Authority (NSA). The aforementioned institution was established in 1995 in order to assure the protection of foreign classified information, made available to Estonia. This function was initially fulfilled by the Co-ordination Director’s Office of the State Chancellery. In 2001 the authority was transferred to the Ministry of Defence. As of 1st of January 2017 the functions of the Estonian National Security Authority are performed by the Estonian Foreign Intelligence Service.
The National Security Authority is required to discharge the following functions: