Group-wise secret key generation
AssigneeInterDigital Technology Corporation
InventorsChunxuan Ye, Alexander Reznik
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Abstract
The present invention relates to a method for constructing a perfectly secret key within a group of nodes. In a group of m nodes, pair-wise secret keys are assigned. Based on pair-wise secret keys, these m nodes generate a group-wise perfectly secret key. In a preferred embodiment, each node communicates with every other node through public noiseless broadcasts.
Claims23
A method for generating a group-wise perfectly secret key in a wireless communication system having a plurality of wireless transmit/receive units (WTRU) utilizing symmetric key encryption, the method comprising:
- a) generating a pair-wise perfectly secret key between at least two WTRUs;
- and
- b) selecting a group-wise perfectly secret key K using the pair-wise secret keys.
A wireless transmit/receive unit (WTRU) capable of generating a group-wise perfectly secret key in a wireless communication system having a plurality of WTRUs utilizing symmetric key encryption, the WTRU comprising:
- a processor configured to generate a pair-wise perfectly secret key with a connected WTRU;
- a receiver for receiving a secret key on a public broadcast channel;
- and
- a processor for determining a group-wise perfectly secret key K based on the pair-wise secret keys.
A method for generating a group-wise perfectly secret key in a fiber optic communication network having a plurality of nodes utilizing symmetric key encryption, the method comprising:
- a) generating a pair-wise perfectly secret key between at least two nodes using quantum cryptography;
- and
- b) selecting a group-wise perfectly secret key K using the pair-wise secret keys.
Dependencies are inferred from the claim text.