Cryptanalysis of a Class of Ideal Secret Sharing Schemes Based on the CRT for Polynomial Rings

Based on the CRT for polynomial rings, Yang, Zhu, Fu and Xia ISIT 2026 proposed a compartmented secret sharing scheme for the compartmented access structure with lower bounds, claiming it can be ideal. We exhibit three families of unauthorized subsets that reconstruct the secret. The scheme is...

On the Leakage of Massey Secret Sharing Schemes under Linear Computations

Leakage attacks on secret sharing schemes exploit partial information about individual shares to recover the underlying secret. In coding theory, linear exact repair schemes LERSs enable the recovery of one codeword symbol from a small amount of information obtained from the remaining symbols,...