Methods and systems for re-securing a compromised channel in a satellite signal distribution environment
First Claim
1. A method implemented by a set top box that encrypts communications for a channel stacking switch connected to a satellite signal receiver of a satellite signal distribution network using a public key of the channel stacking switch, the method comprising:
- obtaining a message from a head end of the satellite signal distribution network;
extracting electronic counter measure (ECM) data from the message;
sending the ECM data to the channel stacking switch;
receiving, in response to the sending, from the channel stacking switch a new public key of the channel stacking switch;
encrypting communications destined for the channel stacking switch using the new public key of the channel stacking switch.
1 Assignment
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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
10 Claims
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1. A method implemented by a set top box that encrypts communications for a channel stacking switch connected to a satellite signal receiver of a satellite signal distribution network using a public key of the channel stacking switch, the method comprising:
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obtaining a message from a head end of the satellite signal distribution network; extracting electronic counter measure (ECM) data from the message; sending the ECM data to the channel stacking switch; receiving, in response to the sending, from the channel stacking switch a new public key of the channel stacking switch; encrypting communications destined for the channel stacking switch using the new public key of the channel stacking switch. - View Dependent Claims (2, 3)
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4. A method for re-securing communications in a satellite signal distribution network, comprising:
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detecting an actual or suspected breach of security of a channel used by a particular channel stacking switch to communicate with one or more set top boxes; obtaining electronic counter measure (ECM) data for the particular channel stacking switch; sending the ECM data to the particular channel stacking switch; commanding a key exchange between the channel stacking switch and at least one of the one or more set top boxes. - View Dependent Claims (5, 6, 7, 8, 9, 10)
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Specification