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IEEE International Conference on Information Theory and Information Security

Provably secure identity-based key agreement protocols under simple assumption

Xiufeng Zhao, Qiuliang Xu, Hao Wang

Published Dec 1, 2010• 1 citation
Publisher

Abstract

In this paper, we present a two-party identity-based key agreement protocol, which is provably secure without random oracles under three static assumptions. It is inspired on a new identity-based encrypt system proposed in TCC 2010 by Lewko and Waters. We show how this key agreement can be used in either escrowed or escrowless mode. We also modify the protocol in the escrow to provide perfect forward secrecy property.

DOI
10.1109/icitis.2010.5689550

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In this paper, we present a two-party identity-based key agreement protocol, which is provably secure without random oracles under three static assumptions. It is inspired on a new identity-based encrypt system proposed in TCC 2010 by Lewko and Waters. We show how this key agreement can be used in either escrowed or escrowless mode. We also modify the protocol in the escrow to provide perfect forward secrecy property.
This paper presents an identity-based key agreement protocols that are provably secure without random oracles(namely,in the standard model).It is inspired by a new identity-based encryption scheme first proposed by Gentry.This paper details how this key agreement can be used in either escrowed or escrowless mode.All the proposed protocols are compared performance(with respect to computational and communication efficiencies) to all known protocols that are only proven secure in the random oracle model.
Key agreement protocols are essential for secure communications in open and distributed environments. Identity-based cryptography has become extremely fashionable in the last few years for its special advantages. In this paper, we point out some flaw in the scheme proposed by Wang et al., then we present a two-party identity-based explicit authenticated key agreement protocol with key confirmation, which was inspired on a new identity-based encryption scheme first proposed by Gentry and can be used properly in the escrowless mode. The scheme captures the attributes of known-key secrecy, key-compromise impersonation resilience, unknown key-share resilience, perfect forward secrecy, and no-key control. Especially, the scheme captures the PKG forward secrecy property. The PKG still could not recover all the userspsila past session keys even he knows the long-term private keys of all users.
To provide secure communications in open and distributed environments, authenticated key agreement protocol is an important primitive for establishing session key. So far, great deals of identity-based protocols have been proposed to provide robust mutual authentication and key establishment in two-party setting. Majority of the existing escrowable identitybased key agreement protocols, however, only provide partial forward secrecy. Therefore, such protocols are unsuitable for real-world applications that require a stronger sense of forward secrecy -- perfect forward secrecy. In this paper, we present a secure two-party identity-based authenticated key agreement protocol, which was inspired on an identity-based encryption scheme first proposed by Gentry (Eurocrypt'06). The proposed protocol achieves most of the required security attributes and can be used properly in the escrow mode. We show that the scheme achieves the attributes of known-key secrecy, key-compromise impersonation resilience, unknown key-share resilience and no key control. In addition, it captures the perfect forward secrecy attribute.
Authenticated key agreement protocol is an important primitive for establishing session key to provide secure communications in open and distributed environment. Key escrow is essential in situations where confidentiality and audit trail are legal requirements, whilst perfect forward secrecy is desirable to provide stronger security. i.e. the adversary couldn't acquire the past session keys even the long term key of user was compromised. In this paper, we present a secure two-party identity-based authenticated key agreement protocol, which was inspired on a new identity-based encryption scheme first proposed by Gentry (Eurocrypt'06). The new protocol achieves most of the required security attributes and can be used properly in the escrow mode. We show that the scheme achieves the attributes of known-key secrecy, key-compromise impersonation resilience, unknown key-share resilience and no key control. In addition, it captures the perfect forward secrecy attribute.
In this paper, we present a two-party attribute-based key agreement protocol, which is secure in random oracle model under the Bilinear Diffe-Hellman assumption. It is inspired by a fuzzy identity-based encryption scheme first proposed by Sahai and Waters. The attribute-based key agreement scheme is a new type of identity-based key agreement scheme, in which we can view identity as a set of descriptive attributes. Our scheme not only preserves the advantages of traditional identity-based key agreement protocol, but also provides some new properties, such as hiding the identity information of the individual, increasing the flexibility of key management.
The certificateless -based authenticated key agreement protocols have the advantages of simplicity of managing identities compared to the PKI-based schemes,as well as avoiding the key escrow issues inherited in the identity-based schemes. This paper proposes a two-party certificateless-based authenticated key agreement scheme based on a provably secure certificateless-based public key encryption scheme.The comparisons with other comparable schemes in security and efficiency show that,the new scheme achieves more of the desired security attributes,such as perfect forward secrecy,PKG forward secrecy,known session-specific temporary information secrecy and key escrowless.Meanwhile it keeps the nice computational efficiency.