基于椭圆曲线和信息隐藏的农业信息安全传输方案

Secure transmission scheme of important agricultural information on networks based on elliptic curve and information hiding

研究在农业信息化中确保重要农业信息在网上传输的安全性。利用有限域上的椭圆曲线可以实现公开密钥加密体制,并且在满足安全性要求的前提下可使用较短的密钥。信息隐藏将秘密消息隐藏在载体信息中,使得无法觉察出秘密消息的存在。利用24位BMP可以实现高效率信息隐藏。结合加密和信息隐藏技术,提出将重要农业信息先用椭圆曲线公钥体制加密,再将密文隐藏于BMP图像中在Internet上进行传输,实现了对重要农业信息传输的双重安全保护,确保了重要农业信息在网上传输的安全性。

The transmission security of important agricultural information on networks was discussed. A public key cryptosystem (PKC) can be implemented using an elliptic curve (EC) on a finite field. The EC-based public key cryptosystem needs shorter keys when keeping the same security. Information hiding stores a secret message into another cover message, so the secret message will not be seen. High efficient information hiding can be implemented using 24bit BMP images. Through combing encryption with information hiding, a scheme for improving the security of transmitted important agricultural information was proposed. The important agricultural information was firstly encrypted using an EC-based public key cryptosystem, and then its ciphertext was hidden into a 24bit bitmap file to be transmitted on Internet. The scheme is a double secure protection way for important agricultural information transmitted on networks, therefore it guarantees the transmission security of important agricultural information on networks.