Group key exchanges with failures

Details Group key exchanges with failures Group key exchanges with failures

2008-08-14

2010-12-14

Tran, Ellen (Department: 2433)

Cryptography

Key management

Having particular key generator

Reexamination Certificate

active

07853015

ABSTRACT:
A method for generating a session key on demand in a network among participating network devices, including choosing a private and public key according to a public key encryption scheme, and broadcasting the public key to each other participating network device; choosing a local contribution value from a multiplicative group of size q; encrypting the local contribution value under the received public key to an encrypted contribution value and sending the encrypted contribution value; receiving encrypted contribution values and deriving decrypted contribution values by applying the private key; deriving a blinded session key from the decrypted contribution values and the local contribution value; agreeing on one of the blinded session keys by using an agreement protocol; and deriving the session key from the agreed-on blinded session key by applying one of the decrypted contribution values and the contribution value A corresponding computer program element, computer program product, and computer device.

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Wei-Chi Ku, et al., An Improved Key Management Scheme for Large Dynamic Groups Using One-Way Function Trees, 2003, IEEE Department of Computer Sciences and Information Engineering.
ELK, A New Protocol for Efficient Large-Group Key Distribution, 2001, IEEE—University of California Berkeley.
Sanjeev Setia, et al., A Scalable Group Re-Keying Approach for Secure Multicast, 2000, IEEE Center for Secure Information Systems.

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