[byteknight]

Encryption is defined as "the process of converting information or data into a code, especially to prevent unauthorized access."

What you describe is the same thing just not cryptographic.

[markild]

Specifically, steganography: https://en.m.wikipedia.org/wiki/Steganography

[byteknight]

Isn't that specific to pictures?

[nixass]

Let's invent it and name it Enogma. For the fun sake