Problem
Consider implementing secret sharing using the locks and keys or-access and and-access controls. Let each decipherment operation take one unit of time, and let each enciphered datum take one unit of space. Under each of the following conditions, how much time and space are needed to store a datum so that t out of n people can reconstruct the datum?
1. For t = 3 and n = 10
2. For t = 5 and n = 10
3. For general t and n (That is, give the general formulae for space and time.)