Natural Generalizations of Threshold Secret Sharing

作者：Farras Oriol^*; Padro Carles; Xing Chaoping; Yang An

来源：IEEE Transactions on Information Theory, 2014, 60(3): 1652-1664.

DOI：10.1109/TIT.2014.2300113

• Cryptography
• secret sharing
• ideal secret sharing schemes
• multipartite secret sharing
• integer polymatroids

We present new families of access structures that, similarly to the multilevel and compartmented access structures introduced in previous works, are natural generalizations of threshold secret sharing. Namely, they admit ideal linear secret sharing schemes over every large enough finite field, they can be described by a small number of parameters, and they have useful properties for the applications of secret sharing. The use of integer polymatroids makes it possible to find many new such families and it simplifies in great measure the proofs for the existence of ideal secret sharing schemes for them.

• 出版日期2014-3