Hello, all!
I’m writting a file system filter driver, But now I’m meeting a
headache problems. Please help me with following problems:
The file system filter driver was used to encrypt/decrypt the data.
But when we use the Wordpad or MicrosoftOffice to save the file,
it does not encrypt the data correctly. For Office file this is
happened only when the file size is over 10MB(it is dependent on the
memory of the computer). But the data were encrypted correctly by our
filter driver when the file size is less then 1MB ~ 2MB. For text file,
if we use the notepad to save the file, it don’t work correctly when
the memory is smaller than 128MB on WindowsXP. But if the memory of the
computer is over512MB, it works well.
Could you please give me some advise on the problems.
Thank you in advance!