Time-bound anonymous authentication for roaming networks

Joseph K. Liu, Cheng-Kang Chu, Sherman S.M. Chow, Xinyi Huang, Man Ho Au, Jianying Zhou

Research output: Contribution to journalArticleResearchpeer-review

37 Citations (Scopus)


We propose an anonymous authentication protocol that supports time-bound credentials for an efficient revocation. It is especially suitable for large-scale network in roaming scenario. With our newly designed group signature scheme as a building block, a timestamp can be embedded to user secret key. No expired key can be used to authenticate, and hence naturally revoked users (e.g., due to contract expiration) are not required to be put into the revocation list. This makes our protocol much faster than previous roaming protocols in terms of revocation checking, which is a main part in verification.
Original languageEnglish
Pages (from-to)178-189
Number of pages12
JournalIEEE Transactions on Information Forensics and Security
Issue number1
Publication statusPublished - Jan 2015
Externally publishedYes


  • Accountable privacy
  • anonymous roaming
  • applied cryptography
  • authentication
  • privacy
  • revocation

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