# Shamir secret sharing where some specific people are required to participate

By using SSSS we distribute the key to "N" people where any "k" (N>=k) are required to participate to unlock the code. But what if I wish to have the people "x" and "y" always be part of "k".

Any provisions for that??

It's very straightforward. You divide your secret into three random shares $$s=s_x\oplus s_y\oplus s_z$$. Now divide $$s_z$$ into $$N-2$$ shares using SSSS and pass these to the non-special participants while passing $$s_x$$ and $$s_y$$ to $$x$$ and $$y$$ respectively.
This can be thought of as a generalisation of a scheme where multiple groups share the secret among them and a certain level of representation is required from each group. The scheme consist of splitting $$s$$ into $$g$$ parts where $$g$$ is the number of groups and then using SSSS on each of the parts.