中文摘要：

针对如何彻底清除Flash型安全存储器中敏感数据这一课题,提出一种逐块清除数据块,并通过覆写关键页重建文件系统的数据清除方案KPOW,其能有效解决数据残余问题。与普通删除、强力删除、格式化3种方法进行实验对比,对比结果表明,在文件删除后数据残余方面,KPOW表现更为突出;在执行效率方面,KPOW耗时较短,且与数据类型规模无关。

英文摘要：

Aiming at the issue that how to delete the sensitive data in the secure storage device clearly, a method clearing data block by block and rebuilding the file system by overwriting the key pages was brought out, namely KPOW, which solved the problem of the presence of residual data in data clearing. Compared with the methods of common deleting, powerful deleting and disk formatting with experiments, the results show that in term of data residue, KPOW is more prominent. And in term of effi- ciency, KPOW consumes shorter time. Moreover it is regardless of the size of the data.