Bitmap

How to hide a message in a bitmap?

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3 Replies - 2332 Views - Last Post: 03 April 2005 - 08:54 AM Rate Topic: -----

#1 Gignac  Icon User is offline

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Bitmap

Posted 02 April 2005 - 09:12 PM

Hi i'm looking for hiding a message in a bitmap file. I'm using the less useful bit of a pixel (in the channel blue,red and green) to encrypt character. A character needs 8 pixel to be encrypt. But i don't know how to change only the last bit of a pixel.
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#2 Amadeus  Icon User is offline

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Re: Bitmap

Posted 03 April 2005 - 06:57 AM

Do you have any code to post as to how you're reading the information in your program? If we see how you're reading it, it may help to come up with a solution on how to change it. C and C++ (and C#) do allow for bit level operations, but there are several ways to accomplish it.
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#3 Gignac  Icon User is offline

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Re: Bitmap

Posted 03 April 2005 - 08:52 AM

Here is a fonction of my main who read and show some detail of a bitmap. But i don't how to hide a message in bmp file? I think that if i put the bmp file in a table of [512pixel]^[512pixel] i will be able to manage the pixel of the bmp file.

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#4 Gignac  Icon User is offline

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Re: Bitmap

Posted 03 April 2005 - 08:54 AM

sorry

This post has been edited by Gignac: 03 April 2005 - 08:54 AM

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