Abstract. Visual cryptography (VC) is often used in secret communications between two different sides. Thebenefit of visual cryptography is that the decryption procedure is without any computations. In the pastschemes, they focused on the quality of decoded images and the problem of pixel expansion, but rarely concernedon the authentication issue. The authentication mechanism can be used to verify whether the decryptedimage is valid. This paper proposed two authentication mechanisms, namely Scheme-1 and Scheme-2, for (2, 2)-visual secret sharing (VSS) with pixel expansion and that with no pixel expansion, respectively.The experiments provide the positive data to confirm the feasibility of the proposed schemes.