Why do we need an app for locking photos or videos? Or even SMS for that matter? All that this does is indicate that either you are a) untrustworthy and have material on your phone that you don't want your wife / girlfriend / husband / boyfriend seeing or alternatively that b) you are full of conspiracy theories and believe that you are being tracked by international drug lords or the CIA.

If you want to hide anything like photos or videos then simply go onto your PC (and I'm working in Windows, one of the linux gurus here will instruct you how to do in either Ubuntu or Linux based machines) and open up a command prompt (Windows key + R, type "cmd" and hit enter) and create a directory called .hidden by typing "mkdir .hidden". This will create a directory called ".hidden" in the root of your C:\ drive. Now connect your phone, using Mass Storage Mode, and transfer the directory called .hidden into either your photos or videos subdirectory.

Linux will not show any directory that starts with a "." and they also won't be indexed by any of the media applications. Also, you have to use command prompt to create this directory as within a windows environment you cannot rename a folder to begin with a "."

Move all files you want hidden into this location using the "mv" command in Xterm, an example is;

To access this location (as it won't show in file manager and the items contained in it wont be indexed by the system) open up the web browser and type into the bottom file:///home/user/MyDocs/.videos/.hidden or if you have hidden it in images file:///home/user/MyDocs/.images.hidden. Voila, your file listing appears in handy and convenient hyperlink stylee.

In terms of SMS that you want to hide, I find the best method to not get caught is to delete.

Alternatively you could always create a completely encrpyted filesystem in a separate partition on your flash memory using AES, DES or even FIPS 46-2, with an encrytpion algorithm anywhere up to and including 2048bit ciphers. Now thats how you hide sh*t.

Be careful out there. Spies are everywhere. Watch your back.

Peace out.