Based On:  https://github.com/zeruniverse/CryptoStego

Features

• Obfuscation - Random initialization of invalid bits
• Non-linear bit-by-bit message storage
• Valid bits and their order decided by SHA512-based hash function
• Password decides the parameter in hash function. Different passwords map message to different locations in the image
• No signal for password error. Wrong password results in wrong message
• LSB (Least Significant Bit) mode
  • Use least significant bits of RGB channels of each pixel to store message
  • Resulting image is visually identical to original one
  • Can only be stored in non-compressed format such as PNG
• DCT (Discrete cosine transform) mode
  • Store information by slightly changing lowest frequency component of each block in frequency domain
  • Robust to image compression but stores less data compared to LSB mode
  • Resulting image looks different from original one