基于ElGamal的改进最低有效位信息隐藏算法设计

ElGamal-Based Improved Least Significant Bit Information Hiding Algorithm Design

摘要: 当前网络环境下，数据安全与隐私威胁日趋多样化和复杂化，单一使用信息隐藏技术或者图像加密技术进行信息的传输，已经无法满足安全可靠传输的要求，提出了一种信息隐藏和图像加密相结合的方法，对数据进行了双层保护。第一层利用改进最低有效位信息隐藏算法将秘密信息嵌入至载体图像中，第二层利用ElGamal加密算法对载体图像进行加密。通过实验证明，该方法能够准确提取秘密信息，可实行性高，在提高数据嵌入量的同时，为数据提供了更高级别的安全性。

Abstract: In the current network environment, data security and privacy threats are becoming increasingly diverse and complex. So the single use of information hiding technology or image encryption technology for information transmission can no longer meet the requirements of safe and reliable transmission, and a method combining information hiding and image encryption is proposed to protect the data in two layers. The first layer uses the improved least significant bit information hiding algorithm to embed the secret information into the carrier image, and the second layer uses the ElGamal encryption algorithm to encrypt the carrier image. Through experiments, it is proved that the method can accurately extract secret information with high implementability and provide a higher level of security for the data while improving the data embedding volume.