Only a receiver programmed with the same random sequence would be able to follow the signal as it hopped from one frequency to another.

ECONOMIST: Player-piano pioneer

Dharmesh Shah says that the earlier in any sequence of words those keywords appear, the stronger the signal Google will receive.

FORBES: Magazine Article

Now random phrases and images came at me the sudden quick-fire assaults that signal a new idea and I knew that they would come in sequence soon enough, their predestined rhythms would assert.

NEWYORKER: Fjord of Killary