Secure group communications
First Claim
1. A method of providing secure communication in a system comprising a master device, at least one auxiliary device and at least one end device, the method comprising:
- establishing a secure communication path between the master device and the at least one end device;
agreeing by the master device and the end device on information necessary to produce at least one key;
generating the at least one key;
providing the at least one key from the master device to the at least one auxiliary device;
authenticating the at least one auxiliary device by the at least one end device using the at least one key; and
establishing another secure communication path between the at least one auxiliary device and the at least one end device.
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Accused Products
Abstract
A device for use in a system with multiple receiving units, and multiple intermediate units each configured to communicate with the device and at least some of the multiple receiving units, includes a communication module configured to send information toward and receive information from the receiving units and the intermediate units, a memory, and a processor coupled to the memory and the communication module. The processor is configured to: cause the communication module to send information toward each of the receiving units sufficient for the receiving units to obtain a key chain corresponding to that receiving unit, each key chain containing a plurality of keys, each key in each key chain being related to other keys in the respective key chains by at least one inverse of a one-way function; select a key from a key chain associated with a particular receiving unit and stored in the memory; and cause the communication module to send the selected key, and an indication of which receiving unit the selected key is associated with, toward the intermediate unit associated with the particular receiving unit.
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Citations
21 Claims
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1. A method of providing secure communication in a system comprising a master device, at least one auxiliary device and at least one end device, the method comprising:
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establishing a secure communication path between the master device and the at least one end device; agreeing by the master device and the end device on information necessary to produce at least one key; generating the at least one key; providing the at least one key from the master device to the at least one auxiliary device; authenticating the at least one auxiliary device by the at least one end device using the at least one key; and establishing another secure communication path between the at least one auxiliary device and the at least one end device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification