图像隐藏技术常与RSA密码体制结合,然而RSA要增加其破译强度必须增加密钥长度,同时图像隐藏信息量却有一定的限制,这就造成密钥存储空间增长与有限隐藏空间的矛盾。论文提出将椭圆曲线密码体制与图像隐藏结合, 利用ECC在相同安全强度下密钥长度短的特点在一定程度上解决了这一矛盾,同时达到安全性和隐蔽性的结合。 However, RSA has to increase the key length to increase its deciphering strength. At the same time, the amount of information hidden in the image has a certain limit, which results in the contradiction between the growth of the key storage space and the limited hidden space. In this paper, the combination of elliptic curve cryptography and image hiding is proposed. By using the feature that the length of the key is short under the same security intensity, ECC solves this contradiction to a certain degree and at the same time achieves a combination of security and concealment.