  Traditional threshold secret sharing cannot realizing all access structures
of secret sharing. So, Ito introduced the concept of Secret sharing scheme
realizing general access structure. But Its scheme has to send multiple shares
to each trustee. In this paper, we proposed two new secret sharing schemes
realizing general access structures by only assigning one share to each
trustee. Our proposed second scheme is a perfect secret sharing scheme.
Furthermore, our schemes can realize any access structures.
