Inside ana's purse, the fbi found a sheet with a matrix, which was crypto material which ana employed when she communicated with the cubans via pagers. that's what we were looking for to determine what the message was between her and cuban intelligence. >> once we had her brevity codes, it was simply a matter of going to a phone, punching in the exact same codes, and we'd match it against the messages that had been sent and would be sent in the future and know exactly what she was telling new york. it told us at the time that she did not perceive herself in danger and was setting up a future m...