On Pseudorandom Encodings
On Pseudorandom Encodings
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关于伪随机编码
DOI:
10.1007/978-3-030-64381-2_23
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Sahai, Amit
中科院分区:
文献类型:
--
作者:
Agrikola, Thomas;Couteau, Geoffroy;Ishai, Yuval;Jarecki, Stanislaw;Sahai, Amit
We initiate a study ofpseudorandom encodings: efficiently computable and decodable encoding functions that map messages from a given distribution to a random-looking distribution. For instance, every distribution that can be perfectly and efficiently compressed admits such a pseudorandom encoding. Pseudorandom encodings are motivated by a variety of cryptographic applications, including password-authenticated key exchange, “honey encryption” and steganography.The main question we ask is whethereveryefficiently samplable distribution admits a pseudorandom encoding. Under different cryptographic assumptions, we obtain positive and negative answers for different flavors of pseudorandom encodings, and relate this question to problems in other areas of cryptography. In particular, by establishing a two-way relation between pseudorandom encoding schemes and efficient invertible sampling algorithms, we reveal a connection between adaptively secure multiparty computation for randomized functionalities and questions in the domain of steganography.
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2015
期刊:
Theory of Cryptography Conference
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DOI:
10.1007/978-3-030-11298-1
发表时间:
2019
期刊:
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通讯作者:
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