On the Feasibility of Identity-based Encryption with Equality Test against Insider Attacks

ePrint Report: On the Feasibility of Identity-based Encryption with Equality Test against Insider Attacks

Keita Emura

As a generalization of public key encryption with keyword search, public key encryption with equality test was proposed, and identity-based encryption with equality test (IBEET) is its identity-based variant.
In IBEET, anyone can check whether two ciphertexts of distinct identities are encryptions of the same plaintext or not using trapdoors. Due to its functionality, IBEET cannot provide any indistinguishability-based security for trapdoor holders. As …

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