[SausageHack]

Hello MSFN...it's been a while since I've posted. I'm in a different area altogether now, with a program I call RARinJPEG. What RiJ does is grab a RAR file and embed it inside a JPEG of your choice. Cool, but how is that useful?

Imagine you need a hide some files (it's a network drive, your boss, parents, etc) and you know that making it a hidden file won't be enough. Adding to a password protected archive is desirable, but once you create it, everyone can see it and they can question about it. For true cryptography, a file must be undetectable. That's where RiJ helps. Simply add your files to a password-protected RAR archive (it can be unprotected) and choose a JPEG image. RiJ combines them, and the finished project acts just like a normal JPEG, except that the size includes the RAR that's inside it (so if you're hiding porn, look elsewhere). When you run it, it makes a folder called MERGE. Put the RAR and the JPEG in here. When it finishes, you will have the new JPEG in that folder (it's easy to use, figure it out).

You can open the hidden files by opening the JPEG with WinRAR or 7Zip.

I am attaching a BETA version of this program. PLEASE leave feedback.

Thanks!

Attached File(s)

•  RARinJPEG Merger.exe (387.5K)
  Number of downloads: 33

This post has been edited by SausageHack: 08 October 2010 - 06:17 PM

[Innocent Devil]

that is called Steganography

[CoffeeFiend]

Innocent Devil, on 18 September 2010 - 12:26 PM, said:

that is called Steganography

Actually, it's kind of neither cryptography (in the sense of encryption) nor stenography (again, subtle differences in meaning which are arguable). This merely hides a file (you could call that cryptography) by appending a file at the end of a jpeg file and nothing more. It's a pretty darn old and well known trick, very much like using NTFS' alternate data streams (which doesn't actually make the files seem WAY larger unlike this). Stenography rather hides the files in the pixels by slightly altering their color (you extract the infos by comparing to a reference picture).

Personally I just use truecrypt.

[Sp0iLedBrAt]

I've done this with 7-Zip through Command Prompt. Will give it a try.

[SausageHack]

CoffeeFiend, on 19 September 2010 - 08:19 PM, said:

Innocent Devil, on 18 September 2010 - 12:26 PM, said:

that is called Steganography

Actually, it's kind of neither cryptography (in the sense of encryption) nor stenography (again, subtle differences in meaning which are arguable). This merely hides a file (you could call that cryptography) by appending a file at the end of a jpeg file and nothing more. It's a pretty darn old and well known trick, very much like using NTFS' alternate data streams (which doesn't actually make the files seem WAY larger unlike this). Stenography rather hides the files in the pixels by slightly altering their color (you extract the infos by comparing to a reference picture).

Personally I just use truecrypt.

Yeah it doesn't alter the data in any way, so I really can't call it cryptography. I'm trying to think of a good algorithm for even better masking, like multi-merge. Any suggestions? Like recursively hiding a copy of the JPEG inside itself?