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Title:	A commutative encryption scheme based on ElGamal encryption
Authors:	Huang, K.;Tso, Ray-Lin 左瑞麟
Contributors:	資科系
Keywords:	Ciphertexts;Commutative encryption;Computational results;Database integration;Diffie-Hellman key exchange;Elgamal encryption;Encryption system;Plaintext;Public keys;Random Oracle model;Real-life applications;Secret sharing;Security proofs;Intelligent control;Security of data;Public key cryptography
Date:	2012
Issue Date:	2015-04-10 16:38:21 (UTC+8)
Abstract:	A commutative encryption is a kind of an encryption system that enables a plaintext to be encrypted more than once using different users` public keys. In this system, decryption is not required before the encryption/re-encryption processes. Moreover, the resulted ciphertext can be decrypted by the designated decrypters without considering the order of public keys used in the encryption/re-encryption processes. In other words, the order of keys used in encryption and in decryption do not affect the computational result. Commutative encryption scheme is found useful in many real life applications such as in secret sharing, database integration and etc. However, regardless of its usefulness, few paper demonstrates how to construct such kind of a commutative encryption. In this paper, we propose a new commutative encryption scheme based on the ElGamel encryption and provide the security proof in the random oracle model. © 2012 IEEE.
Relation:	Proceedings - 3rd International Conference on Information Security and Intelligent Control, ISIC 2012 10.1109/ISIC.2012.6449730
Data Type:	conference
DOI link:	http://dx.doi.org/10.1109/ISIC.2012.6449730
DOI:	10.1109/ISIC.2012.6449730
Appears in Collections:	[Department of Computer Science ] Proceedings

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