The informatisation technology has been highly advanced nowadays, and there are too many difficulties for traditional security technologies to cope with. However, the information hiding technology, as an emerging technology, has shown broad application prospects because of its high safety. Based on information hiding algorithm and unified with cryptographic techniques, in this paper we designed and implemented a viable information hiding system, which has basically realised the embedding and extraction of hidden information, the average similarity achieved is up to 91.42 percent. The hidden information has been encrypted before being embedded, at the receiving end the decryption program is appended, as a result, this eliminates the pitfall of malicious decryption of hidden information during the transmission from source. In this way we guaranteed the security of hidden information, and also ensured the security of carrier information. Its RGB values,root mean square error (RMSE) values before and att er being hidden and peak signal to noise ratio values (PSNR) and other features are analysed by tests, all achieved the quasi-professional level.%信息化技术高度进步的今天,传统的安全技术已显得捉襟见肘,而信息隐藏技术作为一门新兴的技术,因其安全性程度高而显示了广阔的应用前景.基于信息隐藏算法并结合密码技术设计并实现了一个可行的信息隐藏系统,基本实现了隐藏信息的嵌入和提取,平均相似度达到91.42%;在隐藏信息嵌入前,对隐藏信息进行加密,在接收端加入解密程序,从源头上消除了隐藏信息在传输过程中被恶意破解的隐患.保证了隐藏信息的安全性,从而也保证了载体信息的安全性.并通过试验分析了其RGB值、隐藏前后的均方根误差值(RMSE)和峰值信噪比值(PSNR)等特征,达到了准业务水平.
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