Anonymous encryption with partial-order subset delegation and its application in privacy email systems

Mingwu Zhang, Takashi Nishide, Bo Yang, Tsuyoshi Takagi

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


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 chosenciphertext secure scheme, and discuss the efficiency for decryption and the security level.

Original languageEnglish
Pages (from-to)240-249
Number of pages10
JournalIET Information Security
Issue number4
Publication statusPublished - 2014

All Science Journal Classification (ASJC) codes

  • Software
  • Information Systems
  • Computer Networks and Communications


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