International Association for Cryptologic Research
The authors construct the first leakage resilient variants of Fully Homomorphic Encryption (FHE) schemes. Their leakage model is bounded adaptive leakage resilience. They first construct a leakage-resilient leveled FHE scheme, meaning the scheme is both leakage resilient and homomorphic for all circuits of depth less than some pre-established maximum set at the time of key generation. They do so by applying ideas from recent works analyzing the leakage resilience of public key encryption schemes based on the Decision Learning With Errors (DLWE) assumption to the gentry, sahai and waters leveled FHE scheme.