Publication IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer SciencesVol.E89-ANo.11pp.3348-3350 Publication Date: 2006/11/01 Online ISSN: 1745-1337 DOI: 10.1093/ietfec/e89-a.11.3348 Print ISSN: 0916-8508 Type of Manuscript: LETTER Category: Information Security Keyword: dynamic group key agreement, secure group communication, authenticated group key agreement,
Full Text: PDF(74.7KB)>>
Summary: Recently, Dutta and Barua proposed provably secure constant round authenticated group key agreement protocols in dynamic scenario. In this letter, we show that their Leave Protocol does not provide forward secrecy, that is, a leaving user can still obtain the new session key used in subsequent sessions.