整盘加密可获取比文件级加密更优化更抗攻击能力。然而,单个密钥加密加重了加密对磁盘主密钥的依赖性。为解决这类问题,我们提出一个基于多重分段生成密钥的整盘加密方案。最后分析了该方案的性能、安全性及效率。 Whole disk encryption can be more optimized than file-level encryption more anti-attack capability. However, single key encryption aggravates the dependency of encryption on the disk master key. To solve this kind of problem, we propose an entire disk encryption scheme based on multiple sub-keys to generate the key. Finally, the performance, safety and efficiency of the program are analyzed.