Steganographic key ring I am using a key ring app on my iPhone and would like to see an improved or alternative version that makes additional use of security through obscurity in general, and steganography in particular. 

What should happen is that the app allows me to select an image (or video segment, say) locally or in a Cloud (on flickr, say), and would then store my account information in there using steganographic techniques. The actual image would not be remembered by the app and would thus be obscure to any brute force attacker. This should work well, because its quite natural for many images, etc., to be stored and accessed on mobile devices. The app should still encrypt the key ring, and it should be careful about not creating a suspicious signal when placing encrypted content in the carrier medium. 

Call it a steganographic key ring (or key chain; similar to a steganographic file system) then. My question is: Does such an app (already) exist?
A quick search reveals a range of steganography software and solutions for Mac.

The following all appear on the first page of results:


iSteg
SilentEye
Stegosec


As @patrix mentions, security through obscurity provides little security. Be sure to encrypt files and information being embedded in images first.

Tools exist for mass checking images for embedded information and alterations. Search for an image potentially containing embedded information is a task well suited to those with plenty of computer power.