"In some instances, the served agency may allow you to send certain ¡°sensitive¡± information over more ¡°discrete¡± modes, such as packet or other digital mode such as D-Star, Winlink or PSK 31, but be sure they fully understand that no Amateur mode can be considered truly ¡°secure.¡± The served agency is the ultimate authority on which information can or cannot be sent, and by which modes. You will need to make any agency aware in advance that the security of amateur radio communications for confidentiality can never be guaranteed."