secret – Put security classification marks in a document

The pack­age puts a mark in the mar­gin at the start of each para­graph, and at the top of a page when a para­graph runs over onto a new page.
The marks are pro­grammed by com­mands \un­clas­si­fied (mark ‘(U)’), \con­fi­den­tial (mark ‘(C)’), or \se­cret (mark ‘(S)’). The com­mand \nose­cret switches off mark­ing.