マス・フォア・インダストリ研究所

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Towards Constructing Fully Homomorphic Encryption without Ciphertext Noise from Group Theory


開催時期 2022-08-09 12:00~2022-08-09 13:00

場所 Zoomによるオンライン開催

受講対象  

講師 Koji Nuida (Kyushu University)

Abstract: In cryptography, fully homomorphic encryption (FHE) is a special kind of encryption scheme where anyone can perform arbitrary operation on encrypted data without decrypting them. Since the first construction of FHE scheme by Gentry in 2009, all the known "successful" constructions of FHE are based on ciphertexts with noise, which leads to inefficiency for refreshing noisy ciphertexts into ones with less noise. In this talk, I will explain my recent trial to develop FHE schemes without ciphertext noise based on group theory.