On the relation among various security models for certificateless cryptography
type: Item
instance of: scholarly article
title: On the relation among various security models for certificateless cryptography
zbMATH Open document ID: 1154.94399
DOI: 10.1504/IJACT.2008.021084
author: Qiong Huang
author: Duncan S. Wong
published in: International Journal of Applied Cryptography
publication date: 2009-02-24T00:00:00Z
review text: Summary: Certificateless cryptography is a promising technology for solving the key escrow problem in identity-based cryptography. However, the lack of a unified set of definitions and security models currently hinders its progression as much effort has been put on refining the definitions and looking for an appropriate and practical security models. In this article, we aim to contribute on unifying the definitions and security models for Certificateless Encryption (CLE) schemes. First, we show that the original seven-algorithm definition is equivalent to a simplified five-algorithm definition. We believe that this simplified definition may lead to more compact and efficient implementations in practice and also help in the effort of standardisation of CLE. Secondly, we show that a CLE scheme cannot be both malicious Key Generation Center (KGC) secure and strongly secure in the standard model. Due to the practicality and attacking significance of malicious KGC security; and the uncertainty of how practical the strong security is, we, therefore, suggest constructing practical CLE schemes to be malicious KGC secure. Finally, we propose to formalise a new adversarial capability called partial key replacement attack into the security models and show that our generic scheme proposed recently is secure against this new type of attacks.
Mathematics Subject Classification ID: 94A60
zbMATH DE Number: 5510723
zbMATH Keywords: certificateless cryptography
zbMATH Keywords: certificateless encryption
zbMATH Keywords: security models
zbMATH Keywords: Key escrow
zbMATH Keywords: identity-based cryptography
zbMATH Keywords: malicious Key generation centre
zbMATH Keywords: KGC
zbMATH Keywords: partial Key replacement attack
MaRDI profile type: Publication
full work available at URL: ijact.2008.021084
OpenAlex ID: W1976512735
description: scientific article; zbMATH DE number 5510723