In cases where the United States wishes to share bilaterally (or multilateral) classified information with a country that has a sharing agreement, the information is marked by “REL TO USA,” “release” and the country`s three-letter code.  For example, if the United States wanted to disclose secret information to the Canadian government, it would mark the document “REL to USA, CAN.” There are also group sharings such as NATO, FVEY or UKUSA. These countries should keep the classification of the document at the initially classified level (Top Secret, Secret, etc.). [Citation required] For the processing of classified information, specialized computer operating systems, called trusted operating systems, are available. These systems impose the classification and labelling rules described above in the software. However, since 2005, they are no longer considered safe enough to allow unexplained users to share computers with classified activities. So if you create an unclassified document on a secret device, the resulting data is secretly classified until it can be manually verified. Classified information-sharing computer networks are separated by the highest level of sensitivity they are allowed to transmit. B for example SIPRNet (Secret) and JWICS (Top Secret-SCI). In the United States, information is classified when one of the three levels has been assigned to it: confidential, secret or top secret. Information that is not labeled in this way is called “unclassified information.” The declassified term is used for information whose classification has been removed and, by downgrading, it refers to information that has been classified at a lower level but is still classified. Many documents are automatically downgraded and downgraded after a few years. [Citation required] The U.S.
government uses the terms Sensitive But Unclassified (SBU), Sensitive Security Information (SSI), Critical Program Information (CPI), For Official Use Only (FOUO) or Law Enforcement Sensitive (LES) to refer to non-confidential, secret or top secret information, but whose dissemination is still limited. These restrictions may be motivated by export controls, data protection rules, ongoing judicial decisions and criminal investigations, as well as national security. Information that has never been classified is sometimes referred to as “open source” by those who work in classified activities. Public Safety Sensitive (PSS) refers to information similar to the directive, but which could be distributed among the different disciplines of public safety (Law Enforcement, Fire and Emergency Medical Services).