RSA-Based Collusion Resistant Quorum Controlled Proxy Re-encryption Scheme for Distributed Secure Communication
In this paper, we analyze the quorum controlled proxy re-encryption scheme proposed by Jakobsson for the security. We show that the scheme is susceptible to collusion and cannot be used for secure communication. We design a new quorum controlled proxy re-encryption scheme based on RSA public key cryptosystem. We show that the proposed scheme is collusion resistant and non-transitive. Using the quorum/threshold controlled proxy re-encryption scheme, the trust on the proxy can be reduced and single point of failure problem can be solved. The proposed scheme can be used in any network application where distribution of trust and delegation of tasks are the requirements.
KeywordsThreshold proxy re-encryption Distributed trust Collusion resistant
This work is supported by Ministry of Human Resource Development (MHRD), Government of India.
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