Prosecutors allege the couple intended for the stolen personal information to be used in crime.
Blockchain firm SIMBA Chain won a contract to build a system to anticipate demand for "critical" military weaponry parts.
A U.S. Navy command is exploring blockchain tech as part of a plan to reduce paper-based processes in tracking aircraft and weapons parts.
The US Navy will run a blockchain trial this summer – a test largely aimed to boost the security of its manufacturing systems.