FBI + Client Attorney present + University's data scrub + nothing on the public docket likely means FISA court, which is in theory reserved for espionage and terrorism in the US. Most University cryptographic research happens in public these days, so I have a hard time imagining a sequence of events strictly bounded by cryptography research + chinese origin that yields FISA court motions. The real thing to say here i…
No, it doesn't. Foreign Intelligence Surveillance Court proceedings are only warrant applications for surveillance that cannot be used on criminal trials; targets wouldn't be informed of or represented in proceedings.
Espionage or terrorism charges are handled by normal US District Courts, on the public docket (though certain documents and proceedings within those—or any other—cases dealing with classified evidence are handled under special procedures to preserve the secrecy of the evidence )