Hide Text in Photos and Send Secret Messages [Mac only]

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Have you ever wanted to send sensitive information to someone else over the internet? I’m sure you must’ve felt a little paranoid about your details getting stolen along the way. Ever wished there was a way to send messages across to a friend without others knowing? Or even not having the slightest hint that you’re sending a secret message? Do you need a way to disguise your message so that no one could tell anything from plainly looking at it?

Magicians often use this method to distract their audiences away from what is really happening — it’s called misdirection. This is mainly to get someone to focus their attention on something, while you’re performing something totally different.

I’m going to reveal a method to disguise your “sensitive” or “secret” messages within plain photos. Watch closely.

The method is called steganography. It is the science of writing hidden messages in a way that only the sender and recipient will know that there even is a hidden message. Now, if I didn’t tell you that there was a message within the photo above, would you have even known? Tina also discussed steganography back in June for Windows computers and her article is also definately worth reading.

The application featured here today is iSteg. As the name goes, it uses steganography to conceal messages within photos. Think of it as “invisible ink”, if you will.

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Using iSteg is pretty easy. You simply enter a pass-phrase, select the picture file as the disguise, select the text file you wish to conceal within it; and click on ‘Process’. The only criteria which must be fulfilled in order for iSteg to work is:

  • Both the sender and recipient must have iSteg on their computers
  • The text file must be plain text

Everything else is set for you automatically by default.

The output photo is aptly named ‘output.jpg’. Renaming it won’t ruin the encryption so go ahead and rename it whatever you like. In order to extract the hidden message, the recipient will need to re-enter the same pass-phrase used before and select the photo with the secretly hidden message. The only change here is to uncheck the ‘Encode’ box. Then hit ‘Process’ and the message will be revealed.

Now you are able to send anything and no one will even have a clue. Just bear in mind that this method is more about the fun of sending secret messages. Don’t rely on it to encode your sensitive personal information into your photos and never expect anyone to find out.

iSteg only works on Mac OS X and is available from hanynet.com. The source code is also available from the website.

Can anyone tell me what was hidden in the photo above?

(By) Jackson Chung is a full-time medical student attempting to perform a juggling act with relationships, studies and his future.

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Comments (16)
  • aRt

    The scenery is gorgeous.

    Fun app.

  • Jackson

    Hi hany,

    Thanks for dropping by and saying Hi. We love it when we catch the developer’s attention :)

  • hanynet.com

    Hello, I’m the developer of iSteg and I would like to thank you all for your comments.
    iSteg is a mac-only application but it uses a standard open source tool called Outguess.
    Actually iSteg is a cocoa-applescript frontend for the universal binary outguess 0.2 tool.
    You can obtain source code for Outguess and build for any unix-like system on any platform. So you can exchange crypted pictures with non-mac users.
    Regards

    hany

  • Rex

    Answer of whats encoded. Well, home has better scenery but looks nice, where is it? Password is so obvious, duh…

    • Jackson

      Haha don’t get the other readers confused. Just to explain to the rest, the secret text hidden in the photo was a question. Rex just answered it.

      Rex, it’s a from a lookout point over the Remarkable Rocks in Kangaroo Island, Australia.

  • La Blogueria

    So, what’s in there? I don’t have a Mac! Anyway, the important thing was to know how to see it… thanks to all. Now I know I don´t have to watching for 40 minutes crossing eyes :D

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Affiliate Disclamer

This review may contain affiliate links, which pays us a small compensation if you do decide to make a purchase based on our recommendation. Our judgement is in no way biased, and our recommendations are always based on the merits of the items.

For more details, please read our disclosure.
Affiliate Disclamer

This review may contain affiliate links, which pays us a small compensation if you do decide to make a purchase based on our recommendation. Our judgement is in no way biased, and our recommendations are always based on the merits of the items.

For more details, please read our disclosure.