Distributed and secured method and system for protecting and distributing audiovisual flows

A system for distributing audiovisual streams, the system comprising:

• a device for separating an original audiovisual stream into a modified stream and into complementary information, wherein the modified stream has a format corresponding to a format of the original stream, and wherein the complementary information has any format and includes digital information suitable to permit reconstruction of the original stream,
• at least one multimedia server configured to contain protected audiovisual streams, and
• at least one secure central server configured to distribute the complementary information, wherein the secure central server is further adapted to perform a segmentation of the complementary information with respective segments corresponding to audiovisual elements in units of streams of complementary information with a variable size, wherein the secure central server includes an encryption module configured to encrypt the complementary information prior to transmitting the complementary information to a local server for transmission to equipment of an addressee, and wherein the encryption module is further configured to encrypt the complementary information using an encryption key determined by a title of the original stream corresponding to the complementary information and determined by the local server to which the complementary information is to be transmitted.

A system for distributing audiovisual streams, the system comprising:

• a device for separating an original audiovisual stream into a modified stream and into complementary information, wherein the modified stream has a format corresponding to a format of the original stream, and wherein the complementary information has any format and includes digital information suitable to permit reconstruction of the original stream,
• at least one multimedia server configured to contain protected audiovisual streams, and
• at least one secure central server configured to distribute the complementary information, wherein the secure central server is further adapted to perform a segmentation of the complementary information with respective segments corresponding to audiovisual elements in units of streams of complementary information with a variable size, wherein the secure central server is further configured to regulate the quantity of information distributed into a distributed network, taking account of the capacities and restrictions of the distributed network in terms of storage and of access time.