By means of the frequency hopping technique, hopping of the embedding positions from band to band according to the secret key will enhance the randomicity and security.

• 该算法将数字水印技术与跳频技术相结合，使用密钥控制的跳频图样确定水印的嵌入频带，使嵌入位置在若干不同的频带之间跳变，以增强水印嵌入的随机性和安全性。