Image watermark aims at protecting your copyrights using visible watermarks, however, image encryption is to prevent peeping eyes. You can see the watermarked images, however, you will never see the encrypted images unless you have password.
For the images in your computer, you can let the pictures you want seen public and encrypt the pictures you do not want seen private using image encryption. For the images on internet, you can protect your copyright without being copied random with the help of image watermark.
It is more and more important to protect your computer especially the files, images, and folders with the help of special software. After googled for a long time, I have found an excellent image encryption software. This image encryption software is so great that I would like to recommend this to anyone who wants to keep their photos private.
The software I searched this time is Xlinksoft Image Encryption which is only 2.2 MB. It is convenient to download and install, you can download here.

This image encryption is of friendly interface, simple operation, and favorable price. Now, Xlinksoft image encryption is on hot sale, 50% off! This image encryption is easy to use, just take add file for example.
Add file, several ways to do this.
You can click this button to add the files that you want to encrypt. When selecting files, you can press Ctrl/Shift to select several files. If you want to add all the photos in a folder, you can do this: click File menue, select Add Folder, select the folder you want to encrypt, then the photos in this folder will be added in. What’s more,if you do not want to click “add” button, you can drag the file to Xlinksoft Image Encryption program directly. As for the details of adding file you can read the tutorial on Xlinksoft official website or you can click here
The most outstanding feature of this image encryption is humanized. The humanized features are shown in preview window especially. Most important for the encrypted files is that the encrypted files should be convenient to be viewed. I have searched several image encryption programs, they are all good at encrypting but not converienrt to preview. I have to return to the original file format, then to preview. However, Xlinksoft Image Encryption does good at previewing encrypted files. There is a Picture Viewer in this program which is same to Windows. When viewing pictures you just need to double click the encrypted files, that is the files at JVX format, the Picture Viewer can be opened automatially. Look at the following image of Picture Viewer.
You can see, the style of Picture Viewer is same to Windows, this is because we are all familar with the Windows Picture Viewer. How considerate the developper of Xlinksoft Image Encryption is.