Secret sharing
（重定向自Split knowledge）
![Each secret share is a plane, and the secret is the point at which three shares intersect. Two shares yield only a line intersection.](/Images/godic/202502/12/Secretsharing_3-point.svg4904.png")
![](/Images/godic/202502/12/Secretsharing_1.svg4904.png")
![](/Images/godic/202502/12/Intersecting_Planes_2.svg4904.png")
Secret sharing (also called secret splitting) refers to methods for distributing a secret amongst a group of participants, each of whom is allocated a share of the secret. The secret can be reconstructed only when a sufficient number, of possibly different types, of shares are combined together; individual shares are of no use on their own.