Welcome to the resource topic for 2015/672
Title:
Function-Hiding Inner Product Encryption
Authors: Allison Bishop, Abhishek Jain, Lucas Kowalczyk
Abstract:We extend the reach of functional encryption schemes that are provably secure under simple assumptions against unbounded collusion to include function-hiding inner product schemes. Our scheme is a private key functional encryption scheme, where ciphertexts and secret keys correspond to vectors and a decryptor learns the value of the inner product of ciphertext and secret key vectors. Our scheme employs asymmetric bilinear maps and relies only on the SXDH assumption to satisfy a natural indistinguishability-based security notion where arbitrarily many key and ciphertext vectors can be simultaneously changed as long as the key-ciphertext dot product relationships are all preserved.
ePrint: https://eprint.iacr.org/2015/672
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