Hide your files in a JPEG file

For this, you will only need to download WinRAR. You just need to have a little knowledge about Command Prompt and have WinRAR installed.

1. Gather all the files that you wish to hide in a folder anywhere in your PC (make it in C:\hidden - RECOMMENDED).

2. Now, add those files in a RAR archive (e.g. secret.rar). This file should also be in the same directory (C:\hidden).

3. Now, look for a simple JPEG picture file (e.g. logo.jpg). Copy/Paste that file also in C:\hidden.

4. Now, open Command Prompt (Go to Run and type ‘cmd‘). Make your working directory C:\hidden.

5. Now type: "COPY /b logo.jpg + secret.rar output.jpg" (without quotes) - Now, logo.jpg is the picture you want to show, secret.rar is the file to be hidden, and output.jpg is the file which contains both. :D

6. Now, after you have done this, you will see a file output.jpg in C:\hidden. Open it (double-click) and it will show the picture you wanted to show. Now try opening the same file with WinRAR, it will show the hidden archive .

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How Terrorists Hide Secret Messages in Images Part 2

It's a very cool trick but I believe that terrorist must have used this method to convey messages across the world. I just found out that it is possible to hide TEXT messages in any images file. It can be encrypted and the text can't be viewed easily. Hiding text in images is called Steganography is NOT something new. There are freewares that is capable of doing this and the release date is year 2005. Looks like I am a little outdated to know this technique! Continue reading if you're interested to know how to hide text messages in images.

If you search in Google on "Hide Messages in Images", you'll find a lot of program that can do this. Some are shareware and some are freeware. I've tested a few freewares and only 1 of it works fine in hiding messages inside images.

ImageHide is the one that gives me no problem in hiding text messages inside any image file.

It's very easy to hide text messages in images by using ImageHide. First, load any image you want. At the bottom of ImageHide, you can type your secret text. Once you've done that, click on "Write Data button" to insert the text message into your image. Finally, click on Save Image button to save your image in either BMP or PNG format.

To read the hidden text message, click the Load Image button. If there is text embedded into that image, it'll show the ImageHide version you've used to embed the text message, whether it's encrypted or not and also the data size

The image file size is much smaller if you hide text message instead of hide mp3. If a normal image with small scale has big file size, it can be suspicious. I tried inserting a text "This is a Hidden Message" into a PNG image file, surprisingly the file size is 2kb smaller than the original image file.

Hiding text messages in images is NOT only for terrorist use. If you're a graphic designer and someone used your images without your permission, you can sue them by having this very good proof. The person who ripped your images will have nothing to say if the image he has on his computer or website has hidden text that you placed.


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How Terrorists Hide Secret Messages in Images

The process is steganography.Steganography is the art and science of writing hidden messages in such a way that no one apart from the intended recipient knows of the existence of the message; this is in contrast to cryptography, where the existence of the message itself is not disguised, but the content is obscured. Quite often, steganography is hidden in pictures.

The word "Steganography" is of Greek origin and means "covered, or hidden writing". Its ancient origins can be traced back to 440 BC. Herodotus mentions two examples of Steganography in The Histories of Herodotus [1]. Demeratus sent a warning about a forthcoming attack to Greece by writing it on a wooden panel and covering it in wax. Wax tablets were in common use then as re-usable writing surface, sometimes used for shorthand. Another ancient example is that of Histiaeus, who shaved the head of his most trusted slave and tattooed a message on it. After his hair had grown the message was hidden. The purpose was to instigate a revolt against the Persians. Later, Johannes Trithemius's book Steganographia is a treatise on cryptography and steganography disguised as a book on black magic.

Generally, a steganographic message will appear to be something else: a picture, an article, a shopping list, or some other message. This apparent message is the covertext. For instance, a message may be hidden by using invisible ink between the visible lines of innocuous documents.

The advantage of steganography over cryptography alone is that messages do not attract attention to themselves, to messengers, or to recipients. An unhidden coded message, no matter how unbreakable it is, will arouse suspicion and may in itself be incriminating, as in countries where encryption is illegal.[2]

Steganography used in electronic communication include steganographic coding inside of a transport layer, such as an MP3 file, or a protocol, such as UDP.

A steganographic message (the plaintext) is often first encrypted by some traditional means, and then a covertext is modified in some way to contain the encrypted message (ciphertext), resulting in stegotext. For example, the letter size, spacing, typeface, or other characteristics of a covertext can be manipulated to carry the hidden message; only the recipient (who must know the technique used) can recover the message and then decrypt it. Francis Bacon is known to have suggested such a technique to hide messages (see Bacon's cipher).


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