System renewability message data is transmitted to set top boxes, or other devices, using a transport protocol such as, for example, an Internet protocol-type data stream. In accordance with one embodiment, an Extensible Markup Language-type file is received via an Internet protocol-type transport stream. Data, which corresponds to the identities of devices that are unauthorized for the use of certain content, is selected from the Extensible Markup Language-type file. This data from the file is processed whereupon use of the content is prevented in accordance with the data.