Generally, a chinese firewall. A organizational structure that has a "firewall" or "filter" that prevents certain people from seeing certain things.
In this case, Mueller is trying to hide evidence from the defendants, so the judge is allowing a firewall.
In trials, the usual firewall is the judge, personally, who reviews ALL the evidence, and decides what part the defense is entitled to see. CIPA is a form of firewall when defendants are charged, and parts of the case involve classified material.
Zaid explained that if Concord wants to show some information to outsiders -- say, a subject matter expert -- the company's U.S.-based lawyers would have to seek permission from the firewall counsel first. The firewall, in theory, protects both U.S. government secrets and the defense strategy.
Most interesting. Thank Q very much.
Different topic:
Federal court orders FBI/DOJ to preserve all Comey records.
Take that ya scumdog!