Heterogeneous hybrid signcryption for multi-message and multi-receiver.

Shufen Niu,Xiangdong Jia,Caifen Wang,Xiyan Yang,Ling Niu,Yeng-Tseng Wang

doi:10.1371/journal.pone.0184407

Shufen Niu, Xiangdong Jia + Show 4 more

Open Access

https://doi.org/10.1371/journal.pone.0184407

Copy DOI

Journal: PloS one	Publication Date: Sep 8, 2017
Citations: 14	License type: CC BY 4.0

Affiliation: Northwest Normal University

Abstract

To achieve secure communication in heterogeneous cryptography systems, we present a heterogeneous hybrid signcryption scheme. The proposed scheme allows a sender in an identity-based cryptography system to send multi-message to multi-receiver in a certificateless cryptography system with different master keys. At the same time, all users are mapped to a distinct pseudo-identity for conditional identity privacy preservation. A trusted authority could trace the real identity when necessary. Compared with existing schemes, the proposed scheme is more practical for actual applications. In addition, the proposed scheme has indistinguishability against adaptive chosen ciphertext attacks and existential unforgeability against adaptive chosen message attacks under the random oracle model.

Highlights

Diverse network systems have appeared with the development of technology
There are two types of heterogeneous signcryption between public key infrastructure (PKI) and identitybased cryptography (IBC): in type I, a sender in the PKI setting transmits a message to a receiver in the IBC setting; in type II, a sender in the IBC setting transmits a message to a receiver in the PKI setting
Motivated by the above, considering with multi-PKG signcryption [23] and conditional privacy-preserving schemes [24], we propose a heterogeneous hybrid signcryption scheme for IBC to certificateless cryptography (CLC) which meets: (1) The private key generator (PKG) and key generation center (KGC) can produce different master keys and system parameters for different cryptography environments, which are more practical for heterogeneous systems

Summary

Introduction

Diverse network systems have appeared with the development of technology. These systems utilize different cryptography techniques, such as public key infrastructure (PKI), identitybased cryptography (IBC), and certificateless cryptography (CLC). Related heterogeneous signcryption paradigms have received considerable attention in recent years [5,6,7,8] It is a practical way for large messages to use hybrid encryption perform secure communication. Motivated by the above, considering with multi-PKG signcryption [23] and conditional privacy-preserving schemes [24], we propose a heterogeneous hybrid signcryption scheme for IBC to CLC which meets: (1) The private key generator (PKG) and key generation center (KGC) can produce different master keys and system parameters for different cryptography environments, which are more practical for heterogeneous systems. (2) The scheme is insidersecure for both authenticity and confidentiality, and the formal definitions and security models for heterogeneous hybrid signcryption scheme are given.

Non-degeneracy

KGC randomly selects s2 2 ZqÃ and four hash functions: H2

Conclusion