One thing stopped me right away:
When I read that, the first thing I thought was, "Isn't that going to be a little rough on the station's air filters?" Sorry. And, I know, a gram or two more or less of airborne detritus won't be noticed aboard a large installation. It seemed like an odd way to make a lock, though.The attaché case's lock was a shiny, featureless black square that glinted in the tenebrous light. "Spook Central," Paula whispered. The lock disintegrated in a shower of glittering particles.
Another thing I noticed was that Paula's field of expertise had no part in the solution to the problem -- she just happened to be the only person around who could communicate with the other party. This doesn't hurt the story; it was just something I noticed.