New Techniques for Efficient Trapdoor Functions and Applications
New Techniques for Efficient Trapdoor Functions and Applications
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高效活板门功能和应用的新技术
DOI:
10.1007/978-3-030-17659-4_2
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Mohammad Hajiabadi
中科院分区:
文献类型:
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作者:
Sanjam Garg;Romain Gay;Mohammad Hajiabadi
We develop techniques for constructing trapdoor functions (TDFs) with short image size and advanced security properties. Our approach builds on the recent framework of Garg and Hajiabadi [CRYPTO 2018]. As applications of our techniques, we obtain
The first construction of deterministic-encryption schemes for block-source inputs (both for the CPA and CCA cases) based on the Computational Diffie-Hellman (CDH) assumption. Moreover, by applying our efficiency-enhancing techniques, we obtain CDH-based schemes with ciphertext size linear in plaintext size.
The first construction of lossy TDFs based on the Decisional Diffie-Hellman (DDH) assumption with image size linear in input size, while retaining the lossiness rate of [Peikert-Waters STOC 2008].