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Secure and Efficient Threshold Key Issuing Protocol for ID-based Cryptosystems.

K. Phani Kumar, G. Shailaja, Ashutosh Saxena

Published Jan 1, 2006• 11 citations
OpenAlex

Abstract

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.

Related papers

Cryptanalysis and Improvement on an Threshold Key Issuing Protocol

Bo Zhang, Qiuliang Xu, Xin Liu

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.

International Conference on Computational Intelligence and Security Workshops (CISW)•Dec 1, 2007•0 citations

Threshold SKI Protocol for ID-based Cryptosystems

Ashutosh Saxena

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.

International Conference on Information Assurance and Security (IAS)•Aug 1, 2007•5 citations

Threshold SKI Protocol for ID-based Cryptosystems

Ashutosh Saxena

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.

International Conference on Information Assurance and Security (IAS)•Aug 1, 2007•0 citations

Cryptanalysis and Improvement on an Threshold Key Issuing Protocol

Bo Zhang, Qiuliang Xu, Xin Liu

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.

Computational Intelligence and Security•Dec 15, 2007•0 citations

Robust distributed key issuing protocol for identity based cryptography

D. Kalyani, R. Sridevi

In this paper, we propose a robust distributed threshold key transfer protocol or issuing protocol that solves the key escrow problem in identity-based approach. We use threshold cryptographic techniques in each phase of the algorithm such as in system public key setup, key issuing, key securing and private key reconstruction. Our protocol is robust means even t KPA's (out of n = 21 + 1) are corrupted or dishonest the user recover the private key. This protocol can be efficient even if the communication between authorities (KGC and KPAs) is insecure. This approach is useful and offer benefits that are in identity-based techniques, while eliminating key escrow from the setup. In this protocol, either KGC or KPA cannot cheat the users to obtain their private keys. Security analysis of proposed protocol and active adversary assumptions are also presented.

International Conference on Advances in Computing, Communications and Informatics (ICACCI)•Sep 1, 2016•12 citations

Cryptanalysis of Key Issuing Protocols in ID-based Cryptosystems

Raju Gangishetti, M. Choudary Gorantla, Manik Lal Das +1 more

To remove key escrow problem and avoid the need of secure channel in ID based cryptosystem Lee et al. proposed a secure key issuing protocol. However we show that it suffers from impersonation, insider attacks and incompetency of the key privacy authorities. We also cryptanalyze Sui et al.'s separable and anonymous key issuing protocol.

arXiv:cs/0506015•Jun 6, 2005•4 citations
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.
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.
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.
In this paper, we propose a robust distributed threshold key transfer protocol or issuing protocol that solves the key escrow problem in identity-based approach. We use threshold cryptographic techniques in each phase of the algorithm such as in system public key setup, key issuing, key securing and private key reconstruction. Our protocol is robust means even t KPA's (out of n = 21 + 1) are corrupted or dishonest the user recover the private key. This protocol can be efficient even if the communication between authorities (KGC and KPAs) is insecure. This approach is useful and offer benefits that are in identity-based techniques, while eliminating key escrow from the setup. In this protocol, either KGC or KPA cannot cheat the users to obtain their private keys. Security analysis of proposed protocol and active adversary assumptions are also presented.