femtocycle

  This requires [et c.]

Or, they could run their own fabrication facilty, where they can exert total control over the production line, in total secrecy, and you'd never know the difference, or notice a sacrifice in the fidelity of replication.

Think that's impossible? Not at the nation-state level. Not in communist countries where everything is property of the government by default. Not in capitalist countries like the United States, where entire nuclear facilities are replicated in secret. [0]

[0] https://www.businessinsider.com/the-us-built-a-secret-replic...

How close is this to planck time?