>>10993036 (PB)

Steganography .

Steganography is the technique of hiding secret data within an ordinary, non-secret, file or message in order to avoid detection; the secret data is then extracted at its destination. The use of steganography can be combined with encryption as an extra step for hiding or protecting data.

Stenographer

https://courtreportingky.com/stenographer-speed-secrets/

Stenographers, court reporters & transcriptionist use a specialized keyboard called a stenograph machine which has fewer keys than a conventional alphanumeric keyboard. This machine works by pressing multiple keys simultaneously (known as “chording” or “stroking”) to spell out whole syllables, words, and phrases with a single hand motion.

http://securelist.com/steganography-in-contemporary-cyberattacks/79276/

All steganography detection programs today are essentially proof-of-concept, and their logic cannot be implemented in commercial security tools because they are slow, have fairly low detection rates, and sometimes even contain errors in the math