Norway has granted 1,857 asylum seekers a classified status due to foreign policy reasons and security since 2004.
The move makes it impossible for anyone not directly linked with the cases to find out information on the people involved.
This includes the police, immigration authorities, criminal police (Kripos), tax officials, and the Ministry of Justice.
In 2012, there were 775 applications processed concerning these “shielded people”, newspaper Aftenposten reported.
Numbers have increased from 122 to 471 since 2007.
The Directorate of Immigration (UDI) told the paper that Norwegian diplomats are involved in many cases where asylum seekers are granted this status.
Norway’s Ministry of Foreign Affairs can also advise the UDI.
“Afghans currently make up a large part of this group, including cases of Afghan interpreters who have sought asylum in Norway,” said UDI communications director Ingeborg Grimsmo.
“There have previously been many from Iraq,” she added.