Encryption techniques for text information

First, the old method: let the text hiding in the file

In fact, this method has been circulating for a long time, but the effect is very good, this method is suitable for hiding a lot of files, such as EXE executable file, MP3 music files are all right, the most classic is the picture file (BMP or JPG). Its principle is very simple, is an additive synthesis, will need to encrypt the text information (in advance saved in a txt text file) appended to the BMP picture file behind. First create a 1.txt file in D disk, inside the content is to be encrypted text information: Then a picture file 1.bmp also copied to D disk, it is hiding text information "Matrix", and then execute the "start" → "Run" menu command, enter "CMD" and determine to open the system's Command line window, enter "D:" and the carriage return is transferred from the system directory to D disk; Enter a copy command: "Copy1.bmp/b+1.txt2.bmp", the system will prompt "copied 1 files", the function of this command is to use picture file 1.bmp and text file 1.txt "plus" Get up and generate a third file 2.bmp. At this time has been done, if directly in the "My Computer" double hit Open this contains text information picture file 2.bmp, the system will call the computer to open the map, see is the original image (1.bmp) exactly the same picture, The only one by one difference is that the file size is the picture file 1.bmp and the text file 1.txt, and because the text file 1.txt is generally very small (KB level), so generally will not be aware of.

Encryption is encrypted, then how to restore the contents of the 1.txt Chinese text? Very simple, on the new 2.bmp file right click Select "Open mode" → "selector", in the pop-up "open mode" window, select the "Notepad" program to determine, The system will call Notepad immediately to open this picture file 2.bmp. In the Open Notepad window in front 99% of the content is garbled, that is, the original picture file 1.bmp content, drag scroll to the end of the file, you will see the prototype text information. The advantage of this method is that there is no need for third-party software to use the system's own copy command; The disadvantage is that anyone can change the "open mode" call Notepad to open the "new" picture file, and see the last side of the text message.

Second, new moves: Let the text become a two-dimensional code

This time not unarmed, need to use a small tool, the name is called QRCode. After the download decompression will get a file Psqreditchs, double-click on it can be used.

The

interface and how to use it are very simple, first click on the Fourth tab below select "Text Information", and then enter the text you want to encrypt in the input box (software supporting text copy and paste), in the process of entering text you will find a strange black-and-white square graphics, This is called "Two-dimensional code", and it becomes more and more complicated and more and more dense with the increase of the input text information. After the text is entered, click the "Encrypt" option at the bottom of the selected window, and enter the password you set in the "Encrypt password" box earlier. Finally click the third "Save" button on the top toolbar, follow the prompts to choose the saved path and name it, so you get the encrypted message with password protection for the input text information, this file is a BMP bitmap file. From the surface to see what can not see, is a black and white pattern rectangular block, you can send it through e-mail or QQ to friends, even if other people intercepted in the slightest can not see the hidden text information. When the friend receives this "picture", then runs the QRCode software to read it in, and wants to enter the password which sets when the picture is generated, thus will restore the original text information.