MATHEMATICS, cilt.8, sa.10, ss.1-7, 2020 (SCI-Expanded)
A (t,n)-secret sharing scheme is a method of distribution of information among n participants such that any t1 of them can reconstruct the secret but any t-1 cannot. A ramp secret sharing scheme is a relaxation of that protocol that allows that some (t-1)-coalitions could reconstruct the secret. In this work, we explore some ramp secret sharing schemes based on quotients of polynomial rings. The security analysis depends on the distribution of zero-sum sets in abelian groups. We characterize all finite commutative rings for which the sum of all elements is zero, a result of independent interest. When the quotient is a finite field, we are led to study the weight distribution of a coset of shortened Hamming codes.