Threshold Encryption Scheme based on Cocks` IBE Scheme

KIPS Transactions on Computer and Communication Systems, Vol. 19, No. 4, pp. 225-230, Aug. 2012
10.3745/KIPSTC.2012.19.4.225,   PDF Download:


Since one of weak points of public crypto-systems is to require the verification of public key, identity based crypto-systems were proposed as an alternative. However, such techniques need a private key generator which can be a single point of failure. To improve such weakness, threshold identity-based crypto-systems were proposed. In this paper, we propose a new threshold identity-based encryption scheme which is constructed to extend an identity-based encryption scheme by Cocks. Since the proposed scheme is based on quadratic residues, it has smaller complexity of encryption. And we prove that the proposed scheme is secure against a chosen identity attack.

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Cite this article
[IEEE Style]
D. Y. Kim, "Threshold Encryption Scheme based on Cocks` IBE Scheme," KIPS Journal C (2001 ~ 2012) , vol. 19, no. 4, pp. 225-230, 2012. DOI: 10.3745/KIPSTC.2012.19.4.225.

[ACM Style]
Dae Youb Kim. 2012. Threshold Encryption Scheme based on Cocks` IBE Scheme. KIPS Journal C (2001 ~ 2012) , 19, 4, (2012), 225-230. DOI: 10.3745/KIPSTC.2012.19.4.225.