Attribute-based Keyed (Fully) Homomorphic Encryption

ePrint Report: Attribute-based Keyed (Fully) Homomorphic Encryption

Keita Emura, Shingo Sato, Atsushi Takayasu

Keyed homomorphic public key encryption (KHPKE) is a variant of homomorphic public key encryption, where only users who have a homomorphic evaluation key can perform a homomorphic evaluation. Then, KHPKE satisfies the CCA2 security against users who do not have a homomorphic evaluation key, while it satisfies the CCA1 security against users who have the key. Thus far, several KHPKE schemes have been proposed under the standard …

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