How to Hide the File in the Picture?

We can use dos command copy and use WinRAR to hide the file which you don't want someone to see it.
Here is an example.

Step1. First, please choose one picture. For example: Below picture's filename is 01.jpg

 

Step2. Please use WinRAR to create *.rar file. BTW, please remember to set the password while you use WinRAR. The following snapshots are for Gift.rar.

Step3. To use copy command, you can combine 01.jpg and Gift.rar. The new filename is 01_new.jpg. Below is the dos command:
copy /b 01.jpg + Gift.rar 01_new.jpg

Step4. You can check the new file 01_new.jpg now and you can NOT find any difference.

Step5. Finally, you just need to use WinRAR to open 01_new.jpg, and then enter the correct password during the extract process. You can get the file which is hidden in the picture!