By Qiong Huang, Duncan S. Wong, Yiming Zhao (auth.), Jonathan Katz, Moti Yung (eds.)
This ebook constitutes the refereed complaints of the fifth foreign convention on utilized Cryptography and community safeguard, ACNS 2007, held in Zhuhai, China, in June 2007.
The 31 revised complete papers offered have been rigorously reviewed and chosen from round 260 submissions. The papers are prepared in topical sections on signature schemes, machine and community safety, cryptanalysis, group-oriented protection, cryptographic protocols, nameless authentication, identity-based cryptography, safeguard in instant, ad-hoc, and peer-to-peer networks, in addition to effective implementation.
Read Online or Download Applied Cryptography and Network Security: 5th International Conference, ACNS 2007, Zhuhai, China, June 5-8, 2007. Proceedings PDF
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Additional info for Applied Cryptography and Network Security: 5th International Conference, ACNS 2007, Zhuhai, China, June 5-8, 2007. Proceedings
Treehash Input: Leaf l, stack S Output: updated stack S 1. push l to S 2. 1. 2. push H(n2 ||n1 ) to S 3. return S Next, the roots RootTi,1 and authentication paths AuthTi,1 ,0 of of the succeeding trees Ti,1 , i = 2, . . , T are computed with Algorithm 1. As explained above, the initial seeds SeedTi,1 ,0 related to the trees Ti,1 are now available. Finally, after generating the second tree in each layer, the seeds SeedTi,2 ,0 are available, which are stored as part of the private key to allow an eﬃcient generation of trees Ti,2 during the signing process.
HT ), (w1 , . . , wT ) . Remark 1. The Merkle variant CMSS proposed in  is a special case of GMSS. e. P = 2, (h, h), (w, w) . 3). SigT and AuthT ,l 34 J. Buchmann et al. 4). Since those values change less frequently for upper layers, the precomputation can be distributed over many steps. On the one hand, this results in a signiﬁcant improvement of the signing speed. On the other hand, this enables us to choose large Winternitz parameters wi , which results in smaller signatures. 1, we formulate this trade-oﬀ as an optimization problem to ﬁnd an optimal parameter set.
Krawczyk and T. 143-154, 2000. 17. K. Kurosawa and K. 330-346, Springer-Verlag, 2006. 18. K. R. 255-293, Springer-Verlag, 2001. 19. V. 417-426, Springer-Verlag, 1986. 20. D. Pointcheval and J. 361-396, Springer-Verlag, 2000. 21. C. P. 239-252, Springer-Verlag, 1991. 22. A. Shamir and Y. 355-367, Springer-Verlag, 2001. com Abstract. We propose GMSS, a new variant of the Merkle signature scheme. GMSS is the ﬁrst Merkle-type signature scheme that allows a cryptographically unlimited (280 ) number of documents to be signed with one key pair.