Anonymous encryption with partial‐order subset delegation and its application in privacy email systems. Issue 4 (1st July 2014)

• Record Type: Journal Article
• Authors: Zhang, Mingwu; Nishide, Takashi; Yang, Bo; Takagi, Tsuyoshi
• Is Part Of: IET information security. Volume 8:Issue 4(2014)
• Page Start: 240
• Page End: 249
• Publication Date: 2014-07-01
• Subjects: data privacy -- electronic mail -- private key cryptography -- public key cryptography; partial‐order subset delegation -- email privacy systems -- privacy‐carrying email systems -- anonymous encryption scheme -- partial‐order subset delegatable ability -- adaptive chosen‐plaintext attacks -- adaptive chosen‐subset attacks -- computational delegation indistinguishability -- interdisciplinary group email management system -- fine‐grained key delegation -- message confidentiality -- receiver anonymity -- fine‐grained security -- secure email systems; Computer security -- Periodicals; Cryptography -- Periodicals; Computer networks -- Security measures -- Periodicals; Database security -- Periodicals; 005.8
• DOI: 10.1049/iet-ifs.2013.0045
• Languages: English
• ISSNs: 1751-8709

Abstract

Abstract : 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.