Patent ID: 8724808

Claim:
Method of secure distribution of digital data by a content provider through a broadcasting network, wherein the content provider performs the method comprising the steps of: storing digital data scrambled by control words, and the control words used to scramble the digital data in a database associated with the content provider; receiving, via a broadcast network, a request for an item of digital data from a content receiver device; receiving, via the broadcast network, a unique public key being specific to one of a plurality of users in the broadcast network of the content receiver device and a cryptographic certificate associated with said public key from content receiver device; verifying the validity of the public key by analyzing the associated cryptographic certificate; and encrypting the control words using the encryption key received from the content receiver device connected to said broadcast network to obtain encrypted control words, wherein the step of encrypting the control words being performed only in case of positive verification of the public key; and transmitting, via said broadcast network, to said content receiver device: the scrambled digital data; and the encrypted control words.