HARE: Compact HQC via Distance-Informed Erasure Decoding

본문 미리보기

We present HARE, a key encapsulation mechanism (KEM) scheme based on the Hamming Quasi-Cyclic (HQC) framework that achieves substantially reduced public key and ciphertext sizes. HARE focuses on two complementary techniques: a novel distance-informed erasure decoding method for the concatenated code and ciphertext compression based on covering codes. The distance-informed erasure decoding method uses distance information from the inner Reed-Muller decoder to identify unreliable local blocks and