Leaking Secrets in Homomorphic Encryption with Side-Channel Attacks

ePrint Report: Leaking Secrets in Homomorphic Encryption with Side-Channel Attacks

Furkan Aydin, Aydin Aysu

Homomorphic encryption (HE) allows computing encrypted data in the ciphertext domain without knowing the encryption key. It is possible, however, to break fully homomorphic encryption (FHE) algorithms by using side channels. This article demonstrates side-channel leakages of the Microsoft SEAL HE library. The proposed attack can steal encryption keys during the key generation phase by abusing the leakage of ternary value assignments that occurs during the …

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