A Security-Mediated Encryption Scheme Based on ElGamal Variant

Boneh et al. introduced mediated RSA (mRSA) in 2001 in an attempt to achieve faster key revocation for medium-sized organizations via the involvement of a security mediator (SEM) as a semi-trusted third party to provide partial ciphertext decryption for the receiver. In this paper, a pairing-free se...

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Autores principales:	Boon Chian Tea, Muhammad Rezal Kamel Ariffin, Amir Hamzah Abd. Ghafar, Muhammad Asyraf Asbullah
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	computational diffie-hellman problem EIGamal variant encryption fast revocation pairing-free security mediated encryption scheme security mediator Mathematics QA1-939
Acceso en línea:	https://doaj.org/article/5006ff59f48f4e22a3acecacb3f7a20e
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id	oai:doaj.org-article:5006ff59f48f4e22a3acecacb3f7a20e
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spelling	oai:doaj.org-article:5006ff59f48f4e22a3acecacb3f7a20e2021-11-11T18:13:29ZA Security-Mediated Encryption Scheme Based on ElGamal Variant10.3390/math92126422227-7390https://doaj.org/article/5006ff59f48f4e22a3acecacb3f7a20e2021-10-01T00:00:00Zhttps://www.mdpi.com/2227-7390/9/21/2642https://doaj.org/toc/2227-7390Boneh et al. introduced mediated RSA (mRSA) in 2001 in an attempt to achieve faster key revocation for medium-sized organizations via the involvement of a security mediator (SEM) as a semi-trusted third party to provide partial ciphertext decryption for the receiver. In this paper, a pairing-free security mediated encryption scheme based on an ElGamal variant is proposed. The scheme features a similar setting as in the mediated RSA but with a different underlying primitive. We show that the proposed security mediated encryption scheme is secure indistinguishably against chosen-ciphertext attack (IND-CCA) in the random oracle via the hardness assumption of the computational Diffie-Hellman (CDH) problem.Boon Chian TeaMuhammad Rezal Kamel AriffinAmir Hamzah Abd. GhafarMuhammad Asyraf AsbullahMDPI AGarticlecomputational diffie-hellman problemEIGamal variantencryptionfast revocationpairing-free security mediated encryption schemesecurity mediatorMathematicsQA1-939ENMathematics, Vol 9, Iss 2642, p 2642 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	computational diffie-hellman problem EIGamal variant encryption fast revocation pairing-free security mediated encryption scheme security mediator Mathematics QA1-939
spellingShingle	computational diffie-hellman problem EIGamal variant encryption fast revocation pairing-free security mediated encryption scheme security mediator Mathematics QA1-939 Boon Chian Tea Muhammad Rezal Kamel Ariffin Amir Hamzah Abd. Ghafar Muhammad Asyraf Asbullah A Security-Mediated Encryption Scheme Based on ElGamal Variant
description	Boneh et al. introduced mediated RSA (mRSA) in 2001 in an attempt to achieve faster key revocation for medium-sized organizations via the involvement of a security mediator (SEM) as a semi-trusted third party to provide partial ciphertext decryption for the receiver. In this paper, a pairing-free security mediated encryption scheme based on an ElGamal variant is proposed. The scheme features a similar setting as in the mediated RSA but with a different underlying primitive. We show that the proposed security mediated encryption scheme is secure indistinguishably against chosen-ciphertext attack (IND-CCA) in the random oracle via the hardness assumption of the computational Diffie-Hellman (CDH) problem.
format	article
author	Boon Chian Tea Muhammad Rezal Kamel Ariffin Amir Hamzah Abd. Ghafar Muhammad Asyraf Asbullah
author_facet	Boon Chian Tea Muhammad Rezal Kamel Ariffin Amir Hamzah Abd. Ghafar Muhammad Asyraf Asbullah
author_sort	Boon Chian Tea
title	A Security-Mediated Encryption Scheme Based on ElGamal Variant
title_short	A Security-Mediated Encryption Scheme Based on ElGamal Variant
title_full	A Security-Mediated Encryption Scheme Based on ElGamal Variant
title_fullStr	A Security-Mediated Encryption Scheme Based on ElGamal Variant
title_full_unstemmed	A Security-Mediated Encryption Scheme Based on ElGamal Variant
title_sort	security-mediated encryption scheme based on elgamal variant
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/5006ff59f48f4e22a3acecacb3f7a20e
work_keys_str_mv	AT boonchiantea asecuritymediatedencryptionschemebasedonelgamalvariant AT muhammadrezalkamelariffin asecuritymediatedencryptionschemebasedonelgamalvariant AT amirhamzahabdghafar asecuritymediatedencryptionschemebasedonelgamalvariant AT muhammadasyrafasbullah asecuritymediatedencryptionschemebasedonelgamalvariant AT boonchiantea securitymediatedencryptionschemebasedonelgamalvariant AT muhammadrezalkamelariffin securitymediatedencryptionschemebasedonelgamalvariant AT amirhamzahabdghafar securitymediatedencryptionschemebasedonelgamalvariant AT muhammadasyrafasbullah securitymediatedencryptionschemebasedonelgamalvariant
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A Security-Mediated Encryption Scheme Based on ElGamal Variant

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