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please guide me how to hide my custom data in image. i want to generate a image and hide my custom data in image and read back that data from image later. please need idea how to do it.

Mou
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    It's called steganography. I think you should put in some more effort into this and then come back with a real programming question. – Jonas Elfström May 11 '11 at 06:42
  • How "hidden" should the data be, how much data do you have, how should the image look like, like a photo, or would a [QR code](http://en.wikipedia.org/wiki/QR_code) be enough? – Albin Sunnanbo May 11 '11 at 06:44
  • possible duplicate of [Image Steganography](http://stackoverflow.com/questions/2798158/image-steganography), [Image steganography Using C#](http://stackoverflow.com/questions/1998531/image-steganography-using-c), [How can you hide information inside a jpg or gif photo?](http://stackoverflow.com/questions/1216156/how-can-you-hide-information-inside-a-jpg-or-gif-photo) – Cody Gray - on strike May 11 '11 at 07:04

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You could read the format of bitmap image file, open bmp file, identify where the data starts and in the data portion put your data such that each character represents a pixel in image. I am talking about bmp image because its uncompressed format and easy to read.

FIre Panda
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