How to secure a file by password

**rleojoseph** · 22nd March 2011, 05:47

Hi, i am creating a texteditor using QT. I was trying to set a password for a file. What mechanism or class should i use to set a password for a file ??

Can you give me a minimal example that how i can make use of it in my project ??

Added after 55 minutes:

What is the QFile::EncoderFn and QFile::DecoderFn used for ??

**squidge** · 22nd March 2011, 08:12

Depends on your specification - do you want to add a password to a file, or encrypt a file to protect the file being opened without the password ?

**rleojoseph** · 22nd March 2011, 08:28

Ya. I want to add password for a file so that it will be opened if the password is correct.

**squidge** · 22nd March 2011, 10:09

As stated before the threads were merged, use the Qt Cryptographic Architecture.

How to use QCA depends on your specifications - the first thing you need is a cipher, and then you need to decide how to encrypt/decrypt the data using your password.