Efficiently Obfuscating Re-Encryption Program under DDH Assumption.
ACNS(2017)
摘要
The re-encryption functionality transforms a ciphertext encrypted under a public key (pk_1) to a ciphertext of the same message encrypted under a different public key (pk_2). Hohenberger et al. (TCC 2007) proposed a pairing-based obfuscator for the family of circuits implementing the re-encryption functionality under a new notion of obfuscation called as average-case secure obfuscation. Chandran et al. (PKC 2014) proposed a lattice-based construction for the same.
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关键词
Re-encryption functionality, Average-case secure obfuscation, DDH assumption, Standard model
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