A More Efficient Improvement of the Virtual Software Token Protocols

Shuhong WANG
Feng BAO

IEICE TRANSACTIONS on Communications   Vol.E89-B    No.3    pp.945-948
Publication Date: 2006/03/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e89-b.3.945
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Fundamental Theories for Communications
PKI roaming,  software token,  network security,  

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The Virtual Software Token Protocol was proposed by Know as a practical method for secure public key infrastructure roaming. However, he recently found a weakness of the protocol under the original assumption, and proposed two revised versions, namely refinement and improvement, which lost the desirable properties of scalability and efficiency respectively. In this letter, a secure improvement is proposed for better performance in both scalability and efficiency. Unlike the author's improvement, our improvement provides parallel execution as the original protocol did.