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US 8,479,227 B2Granted
System and method for ensuring secure communication between TV and set back box
AssigneesSony Corporation, Sony Electronics Inc.
InventorLudovic Douillet
Life of this patent
Estimating the term…
Abstract
A random number or HDCP key is sent from a TV to a set back box (SBB) over a HDMI channel, and unless the SBB returns the same random number/key to the TV over a USB link, the TV will not communicate further with the SBB.
Claims8
A method comprising:
- establishing a video communication channel between a TV and a source of multimedia;
- establishing a secondary communication channel between the TV and the source;
- sending an encryption data element from the TV to the source over the video communication channel;
- and
- preventing communication between the TV and source if the encryption data element is not returned to the TV from the source over the secondary communication channel, wherein the encryption data element that must be sent from the TV to the source over the video communication channel and returned to the TV from the source over the secondary communication channel to avoid preventing communication between the TV and source is a random number generated by the TV, and/or a High-Bandwidth Digital Content Protection (HDCP) key associated with the TV.
2 more elements
A set box (SB) comprising:
- a SB processor configured to communicate with a TV over both a High Definition Multimedia Interface (HDMI) channel and a secondary channel, the SB processor using the HDMI channel to receive a TV-generated random number and/or a High-Bandwidth Digital Content Protection (HDCP) key associated with the TV, the SB processor using the secondary channel to return to the TV the random number and/or key.
Dependencies are inferred from the claim text.