Methods and systems for re-securing a compromised channel in a satellite signal distribution environment
First Claim
1. A set top box comprising:
- a communications interface configured to communicate with a channel stacking switch over a communication channel, the channel stacking switch distributing satellite signals to a plurality of receivers; and
a processing entity configured to encrypt data destined for the channel stacking switch using a public key of the channel stacking switch, obtain a message from a head end via the communications interface, extract electronic counter measure (ECM) data from the message, send the ECM data to the channel stacking switch via the communication interface, receive a new public key of the channel stacking switch via the communications interface and begin encrypting subsequent data destined for the channel stacking switch using the new public key of the channel stacking switch.
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Accused Products
Abstract
A method implemented by a set top box that encrypts communications for a channel stacking switch (CS) using a public key of the CSS, the method comprising: obtaining a message from a head end; extracting electronic counter measure (ECM) data from the message; sending the ECM data to the CSS; receiving, in response to the sending, a new public key of the CSS; encrypting communications for the CSS using the new public key of the CSS. Also, a method for implementation by a CSS, comprising: maintaining a private key and a public key; obtaining ECM data sent by a set top box in communication with the CSS; obtaining an identifier of the CSS; formulating a new public key based on the private key, the identifier and the ECM; rendering the new public key available to the set top box.
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Citations
18 Claims
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1. A set top box comprising:
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a communications interface configured to communicate with a channel stacking switch over a communication channel, the channel stacking switch distributing satellite signals to a plurality of receivers; and a processing entity configured to encrypt data destined for the channel stacking switch using a public key of the channel stacking switch, obtain a message from a head end via the communications interface, extract electronic counter measure (ECM) data from the message, send the ECM data to the channel stacking switch via the communication interface, receive a new public key of the channel stacking switch via the communications interface and begin encrypting subsequent data destined for the channel stacking switch using the new public key of the channel stacking switch. - View Dependent Claims (2, 3, 4, 5)
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6. A non-transitory computer-readable storage medium storing instructions for execution by a computing entity of a set top box (STB) capable of encrypting communications for a channel stacking switch using a public key of the channel stacking switch, wherein execution of the instructions by the computing entity causes the STB to:
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obtain a message from a head end; extract electronic counter measure (ECM) data from the message; send the ECM data to the channel stacking switch, the channel stacking switch distributing satellite signals to a plurality of receivers; receive, in response to sending the ECM data to the channel stacking switch, a new public key of the channel stacking switch; and encrypt communications destined for the channel stacking switch using the new public key of the channel stacking switch. - View Dependent Claims (7, 8, 9, 10)
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11. A non-transitory computer-readable storage medium storing instructions for execution by a computing entity of a channel stacking switch (CSS) distributing satellite signals to a plurality of receivers, wherein execution of the instructions by the computing entity causes the CSS to:
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maintain a private key and a public key; obtain electronic counter measure (ECM) data sent by a set top box in communication with the channel stacking switch; obtain an identifier of the channel stacking switch; formulate a new public key based on the private key, the identifier and the ECM; and render the new public key available to the set top box. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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Specification