Shamir秘密分享与恢复算法的VC++程序，主要是使用平面上k点可以决定k-1次方的多项式，以k点为门槛值，应用Lagrange多项式插入方法的技术，回复原多项式，再得出主密钥。输入大数长度和份数可自行定义（默认是270位和不超过20份）。-Shamir secret sharing and recovery algorithm VC procedures, is the use of the plane could be decided k k-1 power of the polynomial, a k-value of the threshold, Application of Lagrange polynomial method of technology insertion to restore the original polynomial, then come to the main key. Length and the importation of large numbers of shares to be defined (the default is 270 and not more than 20).