[dfc]

I am channeling grugq here. The answer is clearly stated in Biggie's 3rd Commandment of OPSEC:

  Number 3: Never trust nobody
  Your moms'll set that ass up, properly gassed up
  Hoodied and masked up, shit, for that fast buck
  She be laying in the bushes to light that ass up

The answer from the SIGINT community is

  In God We Trust, All Others We Monitor

The answer from President Reagan:

  Trust but verify

[CamperBob2]

My favorite recent variant: "YES WE SCAN!"

[dfc]

I think that line pales in comparison, and that is being generous. Anyway, Carl Malamud was already using it for a different purpose: https://yeswescan.org/