How to lock a text file with password

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hi,

Iam using text file(.txt) to read some data into c# Dot Net.
I want to protect this file with a password.
Is it possible? Pls give me Reply asap.

Thanks

Regards
Nirmala Saravanan<b></b>

Posted 7-Mar-12 23:49pm

Nirmala Devi Saravanan

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#realJSOP · Answer 1 · 2012-03-07T23:50:00

Solution 1

You can encrypt it (with a password).

Posted 7-Mar-12 23:50pm

#realJSOP

Comments

Mmohmmad 8-Mar-12 6:33am

Thanks for your answers.

If we encrypt files is it possible to crack it?

Dylan Morley 8-Mar-12 6:44am

That totally depends how strong your encryption routine is! Have a look here though, should get you started

http://www.codeproject.com/Articles/5719/Simple-encrypting-and-decrypting-data-in-C

Note this method

public static void Encrypt(string fileIn,
string fileOut, string Password

So, give it the name of the file to be encrypted, the name of the output file & the password to use during the encryption process.

BobJanova · Answer 2 · 2012-03-08T00:48:00

As JSOP says, you can encrypt the contents of the file. Use the password to create a DES3 key or something similar (using one of the cryptographic algorithms shipped with the framework), encrypt the content and re-save the file. Note though that if you do this, the file is essentially no longer a text file and will only be readable by your application.

There is no capability within the text format to specify a password in a similar way to ZIP files, where compliant editors will be able to prompt for it and open the file.