基于图像混合编码的脑电数据加密方法

EEG Data Encryption Method Based on Image Hybrid Coding

针对脑电数据传输过程中的安全性问题,本文提出一种基于压缩编码的脑电数据加密传输方法。发送端对脑电数据进行特征消除的预处理后将其隐写为假图像,并依据脑电数据特征对此图像进行混合编码;接收方通过特定的逆处理过程恢复脑电数据。该方法隐密了脑电数据的特征,在增强数据传输安全性的同时减少了传输数据量。分析结果表明,在保证恢复数据能达到原数据时频域特征的条件下,传输数据比原始脑电数据的熵值提升了42.4%,同时数据压缩比达到1.51,实现了对脑电数据的轻量级高效加密。

Aiming at the security problem in the process of EEG data transmission,an EEG data encryption transmission method based on compression coding is proposed.The transmitter preprocesses the EEG data for feature elimination and secretly writes it as a fake image,and performs hybrid coding on the image according to the EEG data characteristics,the receiver restores the EEG data through a specific inverse process.This method conceals the characteristics of EEG data and reduces the amount of transmitted data while increasing the security of data transmission.The results show that under the condition that the restored data can reach the time-frequency domain characteristics of the original data,the entropy value of the transmitted data is increased by 42.4%compared with the original EEG data,and the data compression ratio reaches 1.51,which realizes lightweight and efficient encryption of EEG data.