Multi-party key agreement method using bilinear map and system therefor
AssigneeElectronics and Telecommunications Research Institute
InventorsNamsu JHO, Dowon HONG, Myunghwan KIM, Byunggil LEE
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Abstract
The present invention provides an efficient method and system in which a plurality of participants share a secret key in a communication environment that is not ensured. According to an embodiment of the invention, each of the participants is assigned with a secret key from a key generation party, generates exchange information, and transmits its own exchange information to the other participant to exchange the exchange information with each other. Each of the participants generates a shared key on the basis of the exchange information and its own secret key.
Claims16
A multi-party key agreement method in which a plurality of participants share a key, the method comprising:
- allowing each of the participants to be assigned with a secret key from a key generation party;
- allowing each of the participants to generate exchange information;
- allowing each of the participants to transmit its own exchange information to the other participants, such that the exchange information is exchanged between the participants;
- and
- allowing each of the participants to generate a shared key on the basis of the received exchange information and its own secret key.
A multi-party key agreement system including a key generation party and a plurality of participants,
- wherein the key generation party assigns a secret key to each of the participants, and
- each of the participants generates exchange information and transmits the exchange information to the other participants, such that the exchange information is exchanged between the participants, and generates a shared key on the basis of the exchange information received from the other participants and its own secret key.
Dependencies are inferred from the claim text.