The ability to turn off the scrambling of your file names has been added, and this article will go over the steps to turn that option off in your account.
In User Settings, under the Privacy tab, you will see two options on the middle of the page regarding the file name scrambling.
For Future Uploads
For All Previous Uploads
For Future Uploads:
This option allows you turn on/off the scrambling of your file names for all future uploads. If you enable it (checking the box), all of your file names will be scrambled on upload. If you uncheck that option, any future uploads will keep the same file name, and the scrambling will not occur.
For All Previous Uploads:
If you have uploaded previous images and wish for the file names to be scrambled, you can select this bar, and all previously uploaded media will have their file names scrambled.
Why would I want to scramble my file names?
There are people out there that create programs called Scripts, which they use against our system to try and find images that are private. They guess the first part of your image URL (username/album name), then the script runs through thousands upon thousands of possible file names, trying to find a match that brings up an image. After it runs for long enough, it can come up with matches for images in your albums, especially ones that have easily guessed file names. Now that they have the full URL of the image, they are able to view it without requiring a password, as the URL's for image are not password protected. The password protection only applies to albums.
Enabling the file name scramble option makes it so those scripts cannot easily find a photo's URL or file name. When they ping against our system so many times, we are notified on our end of this Fusking, and we are able to block/ban their IP address before they are able to find any photos. This is because the characters added during the scrambling of the file name are randomized, and a script cannot guess them efficiently.
If you are worried about the privacy of your images, I would suggest enabling the file name scramble feature.