FIELD: information technology.
SUBSTANCE: translation circuit provides stream content which is encrypted using traffic key. The traffic key is provided to users through a message on a stream of keys which is encrypted by a service key. A user receives at least one object of rights from a rights holder and said at least one object of rights contains a service key required for using the stream content. Said at least one object of rights also contains information on rights of use which can be configured by the rights holder so that different rights are provided depending on the user and/or reception device. The message on the stream of keys can contain a value of the "program category" variable, which indicates the type of content and, together with the object of rights, determines rights to use which are available for the given stream content.
EFFECT: less bandwidth used.
21 cl, 33 dwg
