Patent ID: 6990202

Claim:
A device for packetizing scalably encoded and progressively encrypted data, said device comprising: a receiver that receives a stream of media data from an encoding and encrypting device, wherein at least a first portion of said media data is scalably encoded and progressively encrypted into encrypted encoded data, wherein scalably encoding said media data comprises a first encoding of said media data into a first block of data and a second encoding of said media data into a second block of data such that said first block when decoded reconstructs a first version of said media data and said second block when decoded in combination with said first block reconstructs a second version of said media data, wherein progressively encrypting said media data comprises a first encrypting of said first block to generate a first encrypted encoded block and a second encrypting of said second block in combination with a block selected from the group consisting of said first block and said first encrypted encoded block to generate a second encrypted encoded block, wherein said first encrypted encoded block when decoded and decrypted reconstructs said first version of said media data and said second encrypted encoded block when decoded and decrypted in combination with said first encrypted encoded block reconstructs said second version of said media data; and a packetizer coupled to said receiver that packetizes at least a second portion of said encrypted encoded data into secure and scalable data packets.