Photo Cipher.
Hide secrets inside any photo — even after Discord, Instagram, or Twitter re-compress it. Block-luminance encoding burns data into the image structure, not fragile pixel bits.
How Photo Cipher Works
Unlike classic steganography which hides data in the least significant bits (destroyed by JPEG compression), Photo Cipher burns encrypted data into the brightness structure of 8×8 pixel blocks using Quantization Index Modulation (QIM). Each data bit is embedded 7 times across randomly shuffled blocks for error correction. JPEG compression preserves average block brightness, so the message survives even aggressive re-encoding by Discord, Twitter, or Instagram. The block order is determined by your password, so without it, an attacker cannot even tell which blocks carry data.