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A Coin-Free Oracle-Based Augmented Black Box Framework (Full Paper)

Kyosuke YAMASHITA, Mehdi TIBOUCHI, Masayuki ABE

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Summary :

After the work of Impagliazzo and Rudich (STOC, 1989), the black box framework has become one of the main research domain of cryptography. However black box techniques say nothing about non-black box techniques such as making use of zero-knowledge proofs. Brakerski et al. introduced a new black box framework named augmented black box framework, in which they gave a zero-knowledge proof oracle in addition to a base primitive oracle (TCC, 2011). They showed a construction of a non-interactive zero knowledge proof system based on a witness indistinguishable proof system oracle. They presented augmented black box construction of chosen ciphertext secure public key encryption scheme based on chosen plaintext secure public key encryption scheme and augmented black box separation between one-way function and key agreement. In this paper we simplify the work of Brakerski et al. by introducing a proof system oracle without witness indistinguishability, named coin-free proof system oracle, that aims to give the same construction and separation results of previous work. As a result, the augmented black box framework becomes easier to handle. Since our oracle is not witness indistinguishable, our result encompasses the result of previous work.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E103-A No.10 pp.1167-1173
Publication Date
2020/10/01
Publicized
Online ISSN
1745-1337
DOI
10.1587/transfun.2019DMP0018
Type of Manuscript
Special Section PAPER (Special Section on Discrete Mathematics and Its Applications)
Category
cryptography

Authors

Kyosuke YAMASHITA
  Kyoto University
Mehdi TIBOUCHI
  Kyoto University,NTT Corporation
Masayuki ABE
  Kyoto University,NTT Corporation

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