using cryptographichash in Qt

Question

I am making a program in Qt5.2.1 and in it I am using a text file to store some data. I would like to encrypt it and decrypt it inside the program and display the text stored in the file in a QPlainTextEdit ( or any other similar widget).

I searched and came across Qcryptographichash but i have no idea how to use it. I read somewhere that it does not provide a very secure encryption but that doesn't matter ( I am not expecting hackers to try and read this file).

So, could anyone guide me in the right direction, maybe even give me some code. :D

It is a hash algorithm, not encryption. You cannot get back the original data you hash it from. Google hash vs encryption for more info. — Rosdi Kasim, Mar 12 '14 at 13:48

score 0 · Accepted Answer · edited May 23 '17 at 11:49

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QCryptographic hash creates a hash from given data. That is a one-way process, so the it will not do what you want, namely encrypt the data in a form that can be retrieved via decryption.

You can read more about the difference between encryption and hashes here.

You need to research into possible encryption algorithms. To my knowledge, that's not something that is part of Qt.

It's a large area of on-going research; there are so many to choose from, as you can see here.

edited May 23 '17 at 11:49

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answered Mar 12 '14 at 13:21

TheDarkKnight

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how about crypto++ , that one provides encryption right? – user121273 Mar 12 '14 at 15:03
Yes, it looks like it. – TheDarkKnight Mar 12 '14 at 15:36
Could you tell me how to use that? – user121273 Mar 12 '14 at 15:48
I'd start by reading the manual, but it's not something I've used before: http://www.cryptopp.com/wiki/Category:User_Guide – TheDarkKnight Mar 13 '14 at 08:49

using cryptographichash in Qt

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