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Recent Findings from Korea Institute of Science and Technology Has Provided New Information about Information Technology [An enhanced (t,n) threshold...

July 8, 2014

Recent Findings from Korea Institute of Science and Technology Has Provided New Information about Information Technology [An enhanced (t,n) threshold directed signature scheme]

By a News Reporter-Staff News Editor at Information Technology Newsweekly -- New research on Information Technology is the subject of a report. According to news reporting out of Taejon, South Korea, by VerticalNews editors, research stated, "A directed signature scheme is devised to achieve directivity for verification such that only a designated verifier can check the validity of a signature and, in times of trouble, any third party can verify the signature with the help of the signer or the designated verifier. A threshold directed signature scheme distributes responsibility and authority for generating a directed signature to several users via a threshold mechanism. Lu et al. recently proposed a novel (t, n) threshold directed signature scheme."

Our news journalists obtained a quote from the research from the Korea Institute of Science and Technology, "In this paper, we show that the scheme is vulnerable to a rogue-key attack which is mounted by an adversary who can arbitrarily select his or her public key. Through the rogue-key attack, the adversary can forge a signature on any message for a set of signers. In order to thwart such a rogue-key attack, we propose an enhanced (t, n) threshold directed signature scheme with a reliable key registration protocol. The protocol guarantees that a user should have access to the secret key corresponding to the user's public key. Under the computational Diffie-Hellman assumption, we prove that the improved scheme is secure, that is, it achieves existential unforgeability under the chosen message attack, invisibility, and transitivity in the registered key model."

According to the news editors, the research concluded: "We stress that the security of our improved scheme does not depend on a specific broadcast channel for synchronous message transmission."

For more information on this research see: An enhanced (t,n) threshold directed signature scheme. Information Sciences, 2014;275():284-292. Information Sciences can be contacted at: Elsevier Science Inc, 360 Park Ave South, New York, NY 10010-1710, USA. (Elsevier -; Information Sciences -

Our news journalists report that additional information may be obtained by contacting J.Y. Hwang, Korea Inst Sci & Technol Informat, Taejon 305806, South Korea. Additional authors for this research include H.J. Kim, D.H. Lee and B. Song.

Keywords for this news article include: Asia, Taejon, South Korea, Information Technology

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Source: Information Technology Newsweekly

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