Enhanced delegation-based authentication protocol for PCSs

Tian Fu Lee, Shu Hui Chang, Tzone-Lih Hwang, Song Kong Chong

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)


Lee and Yeh recently presented a delegation-based authentication protocol for portable communication systems (PCSs), which is claimed to provide non-repudiation in on-line authentication. This investigation indicates that their protocol has a weakness in that a malicious visited location register can forge the authentication messages in off-line authentication processes, preventing mobile users from obtaining non-repudiation in such processes. This study also presents an enhanced protocol, which not only has the same security properties as the original protocol but also avoids the weakness in the original scheme and reduces the computational cost.

Original languageEnglish
Article number4927421
Pages (from-to)2166-2171
Number of pages6
JournalIEEE Transactions on Wireless Communications
Issue number5
Publication statusPublished - 2009 May 1

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

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