Ask HN: Interested in a photo sharing app that allows you to hide messages?

I am currently doing the AppSumo Wantrepreneur course. The course has instructed me to contact individuals that I know and communities that I frequent to get a sense of validation for my idea.

The idea is very simple: a mobile photo-sharing app that allows you embed (via steganography) encrypted messages inside the image.

I understand that there are many particular questions concerning the execution of this idea, but I wanted to make this validation process as inexpensive as possible, in regards to both time and money, through the use of emails and community submissions.

Any feedback in the form of comments to this submission or emails sent to me personally would be appreciated. Thank your very much for you time.

Email: mjstahl (at) gmail (dot) com