Re: How to encrypt/decrypt a file

Let me clarify a bit. The clients don't need to be able to decrypt the
file. I am encrypting it for two reasons. One is so that if the file
was to fall in to the wrong hands then they would not be able to make
any sense of it. The second reason is that if the file is encrypted
hopefully the user's would be less likely to open up the file in a text
editor and mess around with it. The requirements for the application
are that the users should be able to download their data from the
program and keep it in a file on their computer. They might want to
email it to a colleague if they wanted to share their data with someone
else. Whoever has the file has to go back to the ASP.NET application
and upload the file to continue working. I am just concerned that
people are going to attempt to open up the file in a text editor and
see what's inside. The underlying data is XML. Since I couldn't
figure out any way to really "lock" the file I figured that encrypting
it would at least discourage people from editing the file in a text
editor. So the clients don't need to decrypt it. The server just
needs to be able to encrypt and decrypt the file all by itself.

Hope this clears up the confusion.

Corey

.

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