|Last Updated||Ratings||Unique User Downloads||Download Rankings|
|2005-04-21 (13 years ago)||74%||Total: 2,993 This week: 1||All time: 1,213 This week: 381|
|bmpcrypt 1.0.0||GNU General Publi...||Graphics, Cryptography|
BmpCrypt is a class that uses the steganography technique to hide encrypted data within a bitmap image (.BMP).
BmpCrypt Class is a very simple stenography PHP class that encodes the data in the bitmap image file. There are four levels of encoding available in this class. Level 1 - hides the data with the least-significant bit of image data bytes Level 2 - hides the data with two least-significant bits of image data bytes Level 3 - hides the data with three least-significant bits of image data bytes Level 4 - hides the data with four least-significant bits fo image data bytes Therefore, a 24-bit or 32-bit bitmap file of size 100KB is able to hide about 10 to 12KB of data with level 1 encoding, 20 to 24KB of data with level 2 encoding, 30 to 32KB of data with level 3 encoding, or 45 to 50KB of data with level 4 encoding.
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