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International Business Machines : Studies from International Business Machines Corporation Describe New Findings in Cryptology (Shorter Quasi-Adaptive NIZK Proofs for Linear Subspaces)

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10/05/2017 | 09:57pm CET

By a News Reporter-Staff News Editor at Information Technology Newsweekly -- Researchers detail new data in Cryptology. According to news reporting from Yorktown Heights, New York, by VerticalNews journalists, research stated, "We define a novel notion of quasi-adaptive non-interactive zero-knowledge (NIZK) proofs for probability distributions on parameterized languages. It is quasi-adaptive in the sense that the common reference string (CRS) generator can generate the CRS depending on the language parameters."

The news correspondents obtained a quote from the research from International Business Machines Corporation, "However, the simulation is required to be uniform, i.e., a single efficient simulator should work for the whole class of parameterized languages. For distributions on languages that are linear subspaces of vector spaces over bilinear groups, we give computationally sound quasi-adaptive NIZKs that are shorter and more efficient than Groth-Sahai NIZKs. For many cryptographic applications quasi-adaptive NIZKs suffice and our constructions can lead to significant efficiency improvements in the standard model. Our construction can be based on any k-linear assumption, and in particular under the eXternal Diffie Hellman ( XDH) assumption our proofs are even competitive with Random Oracle-based Sigma-protocol NIZK proofs. We also show that our system can be extended to include integer tags in the defining linear equations, where the tags are provided adaptively by the adversary. This leads to applicability of our system to many applications that use tags, e.g., applications using Cramer-Shoup projective hash proofs. Our techniques also lead to the shortest known (ciphertext) fully secure identity-based encryption scheme under standard static assumptions."

According to the news reporters, the research concluded: "Further, we also get a short publicly verifiable CCA2-secure IBE scheme."

For more information on this research see: Shorter Quasi-Adaptive NIZK Proofs for Linear Subspaces. Journal of Cryptology, 2017;30(4):1116-1156. Journal of Cryptology can be contacted at: Springer, 233 Spring St, New York, NY 10013, USA. (Springer - www.springer.com; Journal of Cryptology - www.springerlink.com/content/0933-2790/)

Our news journalists report that additional information may be obtained by contacting C.S. Jutla, IBM TJ Watson Res Center, Yorktown Hts, NY 10598, United States.

The direct object identifier (DOI) for that additional information is: https://doi.org/10.1007/s00145-016-9243-7. This DOI is a link to an online electronic document that is either free or for purchase, and can be your direct source for a journal article and its citation.

Keywords for this news article include: Yorktown Heights, New York, United States, North and Central America, Cryptology, International Business Machines Corporation.

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2017, NewsRx LLC

(c) 2017 NewsRx LLC, source Technology Newsletters

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