Method/Step:
1th step: In the iphone iOS7 we click on the "Photo" program:
Step 2nd: Then find the private photos we want to hide as shown in the following illustration:
3rd Step: Then we will edit the photos, click on the solution of the button:
Step 4th: Then the following figure we will see the cutting button in the lower right corner:
5th step: As shown in the picture to hold down the corner of the angle box, drag the top left corner, the picture magnified to see the main body as shown in the following figure:
The 6th step: then we operate well and then click on the upper right corner of the crop button as shown:
The 7th step: The last operation well we click to save, the picture is so hidden:
Finally look at the effect, your photos even if others see, will not know what the content:
To recover, open the cropped photo again, continue with edit-crop, and drag the box on the screen until the photo is restored, and then save:
Drag the right angle box backwards until the original picture is displayed
Friendly Tips
This set a feel if understand a little can take my photo to break, I have not been tested, but I think it should not be so easy to crack.