J. Ian Lindsay
- AES-256 encrypted with optional BZ2 compression.
- Multi-round password hashing to derive key material from passwords.
- No predictable patterns to search for. Offset is derived from the password, and the stride between pixels is arhythmic, with a seed value derived from the password.
- Each color is treated as a discrete channel, with messages able to span channels. This allows up to three independent messages to be overlaid on the same carrier, or one message can occupy multiple channels.
- Option for automatic re-scaling of the carrier image to minimize waste.
- All relevant parameters are derived from the key, or stored as discrete bits, allowing for simple decoding. Just supply a carrier image and a correct password.
- MD5 integrity verification.
- File storage and retrieval
- Built-in trivial logging faculty.
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Bury it under the noise floor
Here is discussed a PHP class to hide encrypted messages and files inside of images without significantly changing the way the image looks.
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John Boyd
hariramanil810
Les Hall
jimmy.c.alzen
Ha! My test fixture was inoperable since I moved my hosting. It has been fixed.