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The design of ultralight-weight authentication protocols that conform to low-cost tag requirements is imperative. This paper analyzes the most important proposals (except for those based in hard problems such as the HB family) in the area and identifies the common weaknesses that have left all of them open to various attacks. Finally, the authors present Gossamer, a new protocol inspired by the recently published SASI scheme that was lately also the subject of a disclosure attack by Hernandez-Castro et al.. Specifically, this new protocol is designed to avoid the problems of the past, and they examine in some deep its security and performance.
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