A trusted system having at least one repository for controlling use of digital works in accordance with usage rights associated with the digital works. A request to use a digital work in accordance with usage rights associated with the digital work is received. The usage rights specify a manner of use and an access specification indicating a security class. A security level of a repository controlling the requested use is determined. The request is granted and the user is permitted to exercise the manner of use specified in the usage rights associated with the digital work if the security level of the repository corresponds to the security class of the access specification specified in the usage rights associated with the digital work.