有限秘密下指派秘密共享方案的构造

针对有限个秘密要分享的情况，提出了一种具有指派功能秘密共享方案的新实现方法。为了说明这一方法，给出了两个实现方案：第一个方案通过引入碎片向量的概念来实现；第二个方案通过引入秘密偏移量的概念来对第一个方案进行优化，能够达到对分享着资源的充分利用。和以往的方案相比．这些方案要求更低的通讯和计算成本；且更加合理和容易实施。

Construction of Assignment Secret Sharing Scheme with Finite Secrets

A new method to the secret sharing scheme with the function of assignment was proposed, in which the circumstance of finite secrets to share was considered. To demonstrate this method, two schemes are provided. The first scheme is realized by introducing a concept of "share vector", the second scheme ameliorates the first scheme by introducing the concept of "secret shift", in which the resource of shareholders is fully used. In contrast with the early one, these schemes require less cost of communication and computation.