Hide files inside JPG!!

I found an interesting tutorial. You can hide files inside an innocent looking JPG image. The secretly created image file will open in any image viewer just like a normal file but if you open it with winrar you will find the hidden files. Pretty neat trick.

*www.thetechtray.net/videos/rar/

This is called STEGANOGRAPHY.

Have a look at *en.wikipedia.org/wiki/Steganography for more information.

I have some software for this on a CD

Its pretty cool for sensitive information. But even terrorists are using this for their activities

cool...people could actually be sending secret messages when you get porno in your mailbox...

ya... steganography became famous (or rather infamous) sometime back with terrorist activities... osama-type message passing methods.

But there are 2 catches..
1. It'll need u to install the steganophing software everytime u need to pack/unpack the file. Nothing like an auto.. or exe file.
2. The file size changed to sum of both the files. So supposing u r putting a 1mb word file in a 50kb jpg file, the new jpg'll be greater than 1mb in size. Those with sharp eyes (or attention to detail) 'll definitely catch the difference as a 50kb jpg'll be small in viewing size and low in quality, but a real 1mb jpg'll be huge and of extremely good quality.

Also to be noted, Steganography is not done only on jpgs, u can put any file format in another file format using it. So an "innocent-looking" cartoon clip can have "bigger-rating" material!!!
Technology changes the face of civilization... a baby can be a babe!!! :lol:

Its good man!!
I liked it!

koolbluez said:
But there are 2 catches..
1. It'll need u to install the steganophing software everytime u need to pack/unpack the file. Nothing like an auto.. or exe file.

Keeping an auto or exe kind of file will simply kill its purpose!! Anyone will execute it and know something is hidden there. Of course, he may not be able to see what without a password

koolbluez said:
2. The file size changed to sum of both the files. So supposing u r putting a 1mb word file in a 50kb jpg file, the new jpg'll be greater than 1mb in size. Those with sharp eyes (or attention to detail) 'll definitely catch the difference as a 50kb jpg'll be small in viewing size and low in quality, but a real 1mb jpg'll be huge and of extremely good quality.

Quite true. But a person will have to have a real eye for the details and be at least a little tech-savvy to think about this. So if we are hiding things from government

things are pretty safe even if 1 GB file is hidden in 1 MB file :lol:

u can also use video or a audio file ...it give u more space..let me explain.....

hey do say wow....

well in this trick we use a JPEG file....lets take the reo. be 1024X768....that means it has 1024X768 pixels in it...now 1 pixel has 3 colour....red,green&blue.....that means 1 pixel is equal to 3 bits....now if we remove one colour from few of the pixels....randon colours....we get some space...and this space is used for hidding text....now a days new techniques r been used but the one i told was the first and the most strongest....he he he he...u can even hide pic in them..... :))

......i read it in a book in my schools lib........

was on Digg

A good tutorial dude .

Amazing man !
Thanks !

What a surprising thing to learn. It is really great! Thanks. :))

whoa , real cool info.

Nice info but this info has been shared, so never try to hide something using it.

R

guys... u can simply hide ur secret document sp any dat or mpeg file by changing the extension... then the icon wd b changed for example: u want to change a dat file into doc.. it will seem as word file or notepad file.. if any1 try to open this then the dat will open in doc format that is the raw from ....for this u just hv to go the folder option>view> then uncheck the hide file extensions for known file type...then just apply n ok... then just change the extension like> movie.dat into> movie.doc....after that in the same way u hv to tick mark the "hide file extensions... isn't it simple....................................................

@ rup

ur method is simple but most of the members know it. Anyways, keep posting coz u know something which others don't.

ok lets see it

F

see this post *labnol.blogspot.com/2006/10/how-to-hide-secret-documents-or.html

Nice tutorial.................thanxs!

i just learnt this new trick, tnx for sharing.

Dis is Good. Thankyou.

Good thread man.........

The movie Along Came A Spider starring Morgan Freeman shows this technology

ha ha ha good one dude

Good tutorial

I try for .mp3 file with .jpg it not work

koolbluez said:
ya... steganography became famous (or rather infamous) sometime back with terrorist activities... osama-type message passing methods.

But there are 2 catches..
1. It'll need u to install the steganophing software everytime u need to pack/unpack the file. Nothing like an auto.. or exe file.
2. The file size changed to sum of both the files. So supposing u r putting a 1mb word file in a 50kb jpg file, the new jpg'll be greater than 1mb in size. Those with sharp eyes (or attention to detail) 'll definitely catch the difference as a 50kb jpg'll be small in viewing size and low in quality, but a real 1mb jpg'll be huge and of extremely good quality.

Also to be noted, Steganography is not done only on jpgs, u can put any file format in another file format using it. So an "innocent-looking" cartoon clip can have "bigger-rating" material!!!
Technology changes the face of civilization... a baby can be a babe!!!

Please tell Some "steganophing software"

R

@ vikas........
buddy it works....mp3>jpg...
try methodically....

@rup........
Afterall
Yas,it work

A good tutorial dude.....

.zip files can be easily hidden inside .jpeg and .gif images without using any external software. The trick is to append the .zip file to .jpeg or .gif file. The trick works because .gif files keep all of their information in the headers, while .zip files keep them in the footer. Since that's the case, .gif viewers read from the front of the file, while .zip readers read from the end.
So for windows users, type this in command prompt:

Code:

 copy /B source.gif+source.zip target.gif

For Linux/Mac users:

Code:

cat somefile.zip >> somefile.gif

Simple redirection of file contents.

Source

Cheers.

cool one dudes

This has been posted b4 also. Thanks anyways for the refresher...

This has been posted b4. Thanks for the refresher anyways...

Dude...this is how you spread viruses...

excellent tutorial..Keep it up..

Can this be used to hide video format files..using the same technique and command...

anything to anything... shyamno... lots of sw too... just search maan.. new ones come up regularly.. but i suppose all r paidware...

@shyamno
As Kaustav said earlier.. u can do it for any combination of filetypes in which the first one is read from its header and other one from its footer..

In case of GIF and Zip
Gif is header and Zip is footer

M

Cooool & yeah i read smwhere thats how u spreasd viruses & hack passwds for email ids