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Privacy-Enhancing Authenticated Key Agreement Protocols Based on Elliptic Curve Cryptosystem

Hong Lei

Published Jan 1, 2008• 4 citations
OpenAlex

Abstract

Authenticated key agreement protocol is designed to provide pair of parties communicating over an insecure network with a secure session key.However,most of the existing authenticated key agreement protocols are not designed for protecting privacy.We emphasize user's privacy properties in network services,in particular we stress anonymity and deniability.We specify the desired security properties of privacy-enhancing authentication key agreement protocols,i.e.mutual authentication,key control,key confirmation,session-key confidentiality,known-key security,forward secrecy,anonymity of user,forward anonymity of user,unlinkability,deniability.Based on elliptic curve cryptosystem we also propose a protocol which satisfies all the desired security properties.

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Authenticated key agreement protocol is designed to provide pair of parties communicating over an insecure network with a secure session key.However,most of the existing authenticated key agreement protocols are not designed for protecting privacy.We emphasize user's privacy properties in network services,in particular we stress anonymity and deniability.We specify the desired security properties of privacy-enhancing authentication key agreement protocols,i.e.mutual authentication,key control,key confirmation,session-key confidentiality,known-key security,forward secrecy,anonymity of user,forward anonymity of user,unlinkability,deniability.Based on elliptic curve cryptosystem we also propose a protocol which satisfies all the desired security properties.
Popularity of group-oriented applications motivates research on security protection for group communications. A number of group key agreement protocols have been proposed for this objective, but most current group key agreement protocols do not consider privacy protection. Group key agreement protocols for networks should also handle dynamic group membership events such as user join and leave events. The Join and Leave Protocols provide backward and forward secrecy respectively. In this paper, we proposed a new anonymous group key agreement protocol based on ID-based encryption cryptosystems. The proposed protocol not only benefits from the desirable features of ID-based cryptosystem, but also provides privacy protection for users. The proposed protocol achieves the following security attribute: anonymity, unlinkability, group key secrecy, group forward secrecy, group backward secrecy, perfect forward secrecy for the group session key and entity authentication.
In this paper, we propose a secure two-factor remote user authentication protocol using Elliptic curve cryptography. The proposed protocol provides the mutual authentication of participants, session key agreement and user anonymity. The security of our proposed protocol is based on one way hash function and elliptic curve cryptosystem and it is secure against all relevant security attacks. Compared with other relevant protocol, the security analysis and performance evaluation show that our proposed protocol can provide high level of security with less communication and computation cost. In addition, the BAN logic is applied to demonstrate the validity of the proposed protocol.
Authenticated key agreement protocol is used to set up the session key and establish secure channel for network communication in the open environment. So far, great deals of identity-based protocols have been proposed to provide robust mutual authentication and key establishment in the two-party setting. Majority of the existing identity-based key agreement protocols require expensive bilinear pairing operation and only provide limited security attributes. Therefore, such protocols are unsuitable for real-world applications that require stronger sense of secrecy. In this paper, we first analysis some of the schemes proposed recently, and then present a one-round ID-based authenticated key agreement protocol with enhanced security attributes, which doesn't need pairing operation and achieves most of the required security attributes, such as known-key secrecy, perfect forward secrecy, PKG Forward Secrecy, key-compromise impersonation resilience, unknown key-share resilience and no key control. In addition, it captures the enhanced security attributes-Known session-specific temporary key information secrecy.
Two-Party Authenticated key agreement protocol is essential for setting up the common session key for parties to establish secure channel for network communication in the open environment. Most of proposed schemes require expensive bilinear pairing operation and only provide limited security attributes. So such protocols are unsuitable for real-world applications that require stronger sense of secrecy. In this paper, we first analysis two schemes recently proposed by Cao etc., and then present a one-round ID-based authenticated key agreement protocol with more desired security attributes, which need no pairing operations while still achieve nice computational efficiency. These security attributes include known-key secrecy, perfect forward secrecy, PKG forward secrecy, key-compromise impersonation resilience, unknown key-share resilience and no key control. Moreover, it captures the enhanced security attributes known session-specific temporary key information secrecy, which means that even the ephemeral secret key were compromised, the adversary can hardly acquire the agreed session key.
Identity-based key agreement protocols allow the participants in a group exchange information over an open network with each other. However, in most of proposed IDbased protocol, identities of group users are exposed, so that eavesdroppers can easily learn who belongs to the specific group. In this paper, we proposed a complete anonymous group key agreement protocol based on the Burmester and Desmedt mechanism and ID-based encryption cryptosystems. The proposed protocol is provably-secure in the random oracle model, and achieves the following security attribute: complete anonymity, unlinkability, group key secrecy, perfect forward secrecy for the group session key and entity authentication.