In this paper, we propose a new (t, n) threshold visual secret sharing scheme which is suitable for grayscale images and for color images. The proposed scheme achieves the following objectives. First, it satisfies
the four general criteria of visual secret sharing systems: security, accuracy, shadow size and computation cost. Second, it ensures the reliability of verification procedures compared with existing verifiable secret sharing schemes. Moreover, the scheme can reconstruct the secret image exactly. Finally, the computational complexity of our proposed scheme is much less than required with other previous schemes. Therefore, our proposed scheme is suitable for real-time applications.