XOR-encryption is the application of a key through bitwise exclusive OR to the source text. The mechanism of the bitwise exclusive is the following:

Thus, when executing an exclusive OR, there will always be a zero value if the variables have the same values.

The peculiarity of XOR is that one and the same function can both encrypt data and decrypt it. This is a simple method of data encryption, which can be hacked quickly enough if there is a large enough encrypted text, or a large password dictionary. But nevertheless, this can already be used for small initial data protection.

In the context of Qt, the use of XOR is no different from how the program was written without using Qt. The question here is how to extract data for encryption from QString objects, for example, if the text was entered in QTextEdit.

To do this, write a program that contains:

• QTextEdit, In which the text will be entered, which will be encrypted.
• QLineEdit, In which the encryption key will be entered.
• QPushButton, In the slot of the click handler of which, data encryption / decryption will be performed. Again, I note that the method will be used the same.

The program will look like this:

Write "Hello, World !!!" On Qt in the IDE CLion using the CMAKE build system. The emphasis on the fact that the project is being developed in IDE CLion was made because to work with the project it is necessary to make a small adjustment for working with CMAKE .

The result is the following application: