1979年,Shamir提出的(k,n)-门限密钥分散管理的概念使密钥管理更加安全灵活,但这一方案也有其不完善之处,因为在现实中参与密钥管理的人在系统中所处的地位不尽相同,有许多活动要求某些特定的人必须参与才能进行。本文考查了此类情形,将(k,n)-门限方案加以推广,提出了更为一般的(t,k,n)-门限方案,并利用(k,n)-门限方案给出了实现(t,k,n)-门限方案的方法。 In 1979, the concept of (k, n) - Threshold Key Scatter Management proposed by Shamir made the key management more secure and flexible. However, this solution also has its imperfection, because in reality the key management personnel in the system In the same position, there are many activities require certain people must be involved in order to proceed. This paper examines such cases and generalizes the (k, n) -threshold scheme and proposes a more general (t, k, n) -threshold scheme. The (k, n) (t, k, n) - Method of threshold scheme.