[TeMPOraL]

Or you can call it encryption along different axis. Much like extracting GPS signals from below thermal floor level - you can do it if you 1) know it's there, and 2) know exactly how to key in. It's impressive as heck, but you can always rephrase it in terms of information theory in ways that makes it sound like slightly different shade of mundane.

[g-b-r]

No, this has nothing whatsoever to do with encryption, and no real security, probably

[TeMPOraL]

Depends on how you modulate it. Think e.g. frequency hopping / spread spectrum: it's encryption, just done on modulation instead of transmitted data.

[g-b-r]

Encryption is encryption, and frequency hopping is not encryption