In Greek mythology, Pandareus was the son of Clymene and Merops. At the request of his friend, Tantalus, Pandareus stole a bronze dog from a temple to Zeus on Crete. According to various sources, he was turned to stone or fled to Sicily.
... a clear discussion of two prominent proposals.
Examples of existing "digital rights management" and "copy protection" systems:
Serial copy management system[?] ...