System and method for ensuring secure communication between TV and set back box
First Claim
Patent Images
1. A method comprising:
- establishing a high definition multimedia interface (HDMI) video communication channel between a TV and a source of multimedia;
establishing a serial bus secondary communication channel between the TV and the source;
sending a High Bandwidth Digital Content Protection (HDCP) encryption data element from the TV to the source over the HDMI video communication channel; and
preventing communication between the TV and source if the HDCP encryption data element is not returned to the TV from the source over the serial bus secondary communication channel.
3 Assignments
0 Petitions
Accused Products
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.
-
Citations
15 Claims
-
1. A method comprising:
-
establishing a high definition multimedia interface (HDMI) video communication channel between a TV and a source of multimedia; establishing a serial bus secondary communication channel between the TV and the source; sending a High Bandwidth Digital Content Protection (HDCP) encryption data element from the TV to the source over the HDMI video communication channel; and preventing communication between the TV and source if the HDCP encryption data element is not returned to the TV from the source over the serial bus secondary communication channel. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A TV, comprising:
-
at least one TV display; and at least one TV processor configured for communicating with a set box (SB) over both a High Definition Multimedia Interface (HDMI) channel and a universal serial bus (USB) channel, the at least one TV processor using the HDMI channel to send to the SB a TV-generated random number and/or a High-Bandwidth Digital Content Protection (HDCP) key associated with the TV, the at least one TV processor configured to receive back from the SB over the USB channel the random number and/or HDCP key. - View Dependent Claims (9)
-
-
10. 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 HDCP key, wherein the secondary channel is a universal serial bus (USB) link or an RS232 link or an IC2 link. - View Dependent Claims (11)
-
12. A method comprising:
-
exchanging a High-Bandwidth Digital Content Protection (HDCP) data element between a TV and a set box (SB) using both a High Definition Multimedia Interface (HDMI) channel and a secondary channel, wherein the HDCP data element is sent from the TV to the SB over the HDMI channel and the HDCP data element is returned to the TV by the SB over the secondary channel; and using the HDCP data element to authenticate the SB and/or the TV, wherein the secondary channel is a universal serial bus (USB) link or an RS232 link or an IC2 link. - View Dependent Claims (13, 14, 15)
-
Specification