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International Conference on Information Technology: Coding and Computing (ITCC)

An efficient secure key issuing protocol in ID-based cryptosystems

Raju Gangishetti, M. Choudary Gorantla, Manik Lal Das, A. Saxena, V.P. Gulati

Published Jan 1, 2005• 38 citations
Publisher

Abstract

This paper presents an efficient and secure protocol for key issuing in ID-based cryptosystems using bilinear pairings. We use a simple blinding technique to eliminate the need of secure channel and multiple authorities approach to avoid the key escrow problem. We show that our protocol overcomes the disadvantages of other pairing based schemes and is efficient compared to the existing key issuing protocol.

DOI
10.1109/itcc.2005.75

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This paper presents an efficient and secure protocol for key issuing in ID-based cryptosystems using bilinear pairings. We use a simple blinding technique to eliminate the need of secure channel and multiple authorities approach to avoid the key escrow problem. We show that our protocol overcomes the disadvantages of other pairing based schemes and is efficient compared to the existing key issuing protocol.
Key issuing protocols deal with overcoming the two inherent problems: key escrow and secure channel requirement of the identity based cryptosystems. An efficient key issuing protocol enables the identity based cryptosystems to be more acceptable and applicable in the real world. We present a secure and efficient threshold key issuing protocol. In our protocol, neither KGC nor KPA can impersonate the users to obtain the private keys and thus it achieves the trust level III [16]. The protocol is secure against replay, man-in-the-middle and insider attacks.
Traditional public key cryptography uses certificates to bind the users with their public keys and are considered the best alternative for key distribution, but requires to have a very involved key management process. Identity based cryptography makes the key management easier but suffers from the key escrow problem and requires secure channel to issue the private keys to the users. Key issuing protocols deal with secret key issuing (SKI) process to overcome the two problems. We present an efficient and secure key issuing protocol which enables the identity based cryptosystems to be more acceptable and applicable in the real world. In the protocol, neither key generating center nor key privacy authority can impersonate the users to obtain the private keys. Performance and security analysis are being carried out for the protocol and is shown that it is efficient and secure against replay, man-in-the-middle and insider attacks.
Traditional public key cryptography uses certificates to bind the users with their public keys and are considered the best alternative for key distribution, but requires to have a very involved key management process. Identity based cryptography makes the key management easier but suffers from the key escrow problem and requires secure channel to issue the private keys to the users. Key issuing protocols deal with secret key issuing (SKI) process to overcome the two problems. We present an efficient and secure key issuing protocol which enables the identity based cryptosystems to be more acceptable and applicable in the real world. In the protocol, neither key generating center nor key privacy authority can impersonate the users to obtain the private keys. Performance and security analysis are being carried out for the protocol and is shown that it is efficient and secure against replay, man-in-the-middle and insider attacks.
Key issuing protocols deal with overcoming the two inherent problems: key escrow and secure channel requirement of the identity based cryptosystems. An efficient and secure key issuing protocol enables the identity-based cryptosystems to be applicable in the real world. We analyze an threshold key issuing protocol due to Gangishetti et al. and show that the protocol suffers from the attacks of the malicious KGC and the users can deny that they have never received the key. Furthermore, we present an improved protocol, which is undeniable and secure against KGC's attacks.
Key issuing protocols deal with overcoming the two inherent problems: key escrow and secure channel requirement of the identity based cryptosystems. An efficient and secure key issuing protocol enables the identity-based cryptosystems to be applicable in the real world. We analyze an threshold key issuing protocol due to Gangishetti et al. and show that the protocol suffers from the attacks of the malicious KGC and the users can deny that they have never received the key. Furthermore, we present an improved protocol, which is undeniable and secure against KGC's attacks.