By Dan Boneh (auth.), Xiaoyun Wang, Kazue Sako (eds.)
This publication constitutes the refereed lawsuits of the 18th overseas convention at the conception and alertness of Cryptology and data safeguard, Asiacrypt 2012, held in Beijing, China, in December 2012. The forty three complete papers offered have been conscientiously reviewed and chosen from 241 submissions. they're prepared in topical sections named: public-key cryptography, beginning, symmetric cipher, protection facts, lattice-based cryptography and quantity idea, hash functionality, cryptographic protocol, and implementation issues.
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Extra info for Advances in Cryptology – ASIACRYPT 2012: 18th International Conference on the Theory and Application of Cryptology and Information Security, Beijing, China, December 2-6, 2012. Proceedings
Algorithm B cma dlin such that AdvufSIG1,A (λ) ≤ (qs + 3) · AdvG,B (λ) + 1/p. Constant-Size Structure-Preserving Signatures under Simple Assumptions 19 6 Instantiating SIG2 We instantiate the POS and xSIG building blocks of our second generic construction to obtain our second SPS scheme. Here we choose the Type-III bilinear group setting. The resulting SIG2 scheme is an efficient structure-preserving signature scheme based on SXDH and XDLIN. Setup for Type-III groups. The following setup procedure is common for all building blocks in this section.
A natural future direction is to complement our work by discovering prime order analogs of our techniques. Many previous systems were originally constructed in composite order groups and later transferred into prime order groups [16,34,18,33,19,47,35,38,37,28,29,40,46]. The general techniques presented in [28,39] do not seem directly applicable here, but we emphasize that our dual form framework is not tied to composite order groups and could also be used in the prime order setting. Discussion of additional related works can be found in the full version.
For a message in Gk11 × Gk22 , the above POSb uses a public-key of size (k + 2, k + 1), yields a one-time public-key of size (0, 1) (for mode = normal) or (0, 3) (for mode = extended), and a signature of size (3, 2). Verification requires 2 pairing product equations. A one-time public-key in extended mode, which is treated as a message to xSIG ˆ a ) ∈ G32 . Structure-preservance and in this section, is of the form opk = (Fˆ2a , Fˆ3a , U uniform public-key property are taken over from the underlying POSu1 and POSu2.
Advances in Cryptology – ASIACRYPT 2012: 18th International Conference on the Theory and Application of Cryptology and Information Security, Beijing, China, December 2-6, 2012. Proceedings by Dan Boneh (auth.), Xiaoyun Wang, Kazue Sako (eds.)