Open AccessAnonymous encryption with partial‐order subset delegation and its application in privacy email systems
Author(s) -
Zhang Mingwu,
Nishide Takashi,
Yang Bo,
Takagi Tsuyoshi
Publication year - 2014
Publication title -
iet information security
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.308
H-Index - 34
eISSN - 1751-8717
pISSN - 1751-8709
DOI - 10.1049/iet-ifs.2013.0045
Subject(s) - computer science , encryption , delegation , computer security , plaintext , anonymity , ciphertext , communication source , cryptography , confidentiality , computer network , political science , law
In privacy‐carrying email systems, the authors should guarantee that the email content is confidential and sometimes the sender/receiver identities are hidden. Also, they require that the key generation is flexible and manageable. In this study, first, they propose an anonymous encryption scheme that supports a partial‐order subset delegatable ability. The proposed scheme achieves the security properties of confidentiality against adaptive chosen‐plaintext attacks, anonymity against adaptive chosen‐subset attacks and computational delegation indistinguishability. Secondly, they provide a deployment application of their anonymous encryption in an interdisciplinary group email management system with flexible and fine‐grained key delegation. The deployment can achieve the privacy of message confidentiality, receiver anonymity and delegation obliviousness, which has fine‐grained security in secure email systems. Finally, they provide an extension for the chosen‐ciphertext secure scheme, and discuss the efficiency for decryption and the security level.