Efficient revocation of security capability in certificateless public key cryptography

Authors:
Hak Soo Ju;Dae Youb Kim;Dong Hoon Lee;Jongin Lim;Kilsoo Chun
Affiliations:
Korea Information Security Agency(KISA), Korea;Center for Information and Security Technologies;Center for Information and Security Technologies;Center for Information and Security Technologies;Korea Information Security Agency(KISA), Korea
Venue:
KES'05 Proceedings of the 9th international conference on Knowledge-Based Intelligent Information and Engineering Systems - Volume Part II
Year:
2005

Citing 6
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ACM Transactions on Internet Technology (TOIT)
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SSYM'01 Proceedings of the 10th conference on USENIX Security Symposium - Volume 10

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Abstract

This paper presents the first mediated certificateless public key encryption and signature schemes. We also extend our schemes into hierarchical schemes. Our schemes does not suffer from the key escrow property that seems to be inherent in the mediated identity-based schemes. Key escrow is not always a good property for all applications because the exposure of a master key enable all the users' private keys to be leaked. Our mediated certificateless public key encryption and hierarchical schemes also support role based access control (RBAC) without the key escrow to manage the access to resources of a system. We finally describe security of our schemes and compare our schemes with the mediated identity based schemes from efficiency points of view.