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US 8,806,526 B2Granted
Security processing unit with secure connection to head end
AssigneeBroadcom Corporation
InventorStephane Rodgers
Life of this patent
Estimating the term…
Abstract
A system includes a transport central processing unit of an information appliance device. The transport central processing unit receives a message from a head-end. The transport central processing unit provides access of the message to the security processing unit. A host central processing unit connected with the transport central processing unit is prohibited access to the message.
Claims20
A system, comprising:
- a transport central processing unit of an information appliance device, the transport central processing unit configured to:
- receive a message from a head-end;
- and
- determine an intended recipient unit for the message;
- a security processing unit connected with the transport central processing unit, the transport central processing unit configured to provide access of the message to the security processing unit;
- and
- a host central processing unit connected with the transport central processing unit, the transport central processing unit configured to prohibit access of the message to the host central processing unit responsive to the determination.
4 more elements
An information appliance device, comprising:
- a host central processing unit connected with a memory having a protected region, where the host central processing unit is not configured to have access to the protected region;
- a security central processing unit connected with the memory, where the security central processing unit is configured to have access to the protected region of the memory;
- and
- a transport central processing unit configured to:
- determine when a message from a head-end is not intended for the host central processing unit;
- and
- responsive to the determination, store the message from the head-end in the protected region without passing the message through the host central processing unit.
4 more elements
A method, comprising:
- receiving an encrypted video, audio or other data stream from a head-end, the video, audio or other data stream including a message inserted in the video, audio or other data stream, the message being only meant for a security processing unit of an information appliance device, but not a host central processing unit of the information appliance device;
- decrypting the video, audio or other data stream including the message;
- determining that the message is not meant for the host central processing unit;
- and
- responsive to the determination, providing the message to the security processing unit but not providing the message to the host central processing unit.
2 more elements
Dependencies are inferred from the claim text.