1.a message written in a secret code
2.a mathematical element that when added to another number yields the same number
3.a quantity of no importance;
it looked like nothing I had ever seen before
4.a person of no influence
5.a secret method of writing
1.convert ordinary language into code;
We should encode the message for security reasons
2.make a mathematical calculation or computation
一 DOS命令 显示或更改 NTFS 分区上的目录[文件]的加密 CIPHER [/E | /D] [/S:directory] [/A] [/F] [/Q] [/H] [pathn CIPHER /K CIPHER /R:filename CIPHER /U [/N] CIPHER /W:directory CIPHER /X[:efsfile] [filename] /A 在文件及目录上操作。如果父目录没有加密,当加密文件 被修改后,它可能被解密。建议您给此文件和父目录加密。 /D 将指定的目录解密。会标记目录,这样随后添加的文件 就不会被加密。 /E 将指定的目录加密