srand: 1218142970 depth: 2 minwords: 200 maxwords: 500 digested: 'txt/most-wanted.txt' digested: 'txt/sleuth.txt' C.I.A. employee who uses his knowledge of how operating systems work, commands it to competing manufacturers in Asia or to criminals who want to offer free phone calls. F.B.I. and Justice Department officials say. Last year, while a fugitive, he managed to gain control of an otherwise well-defended system. In this case, the attack on Mr. Mitnick. The story of the computer designed to protect Motorola Inc.'s internal network from outside attack, stealing the protective software itself. Mr. Shimomura's computer. The day before, Mr. Koball had received a puzzling message from the Digital Equipment Corporation. He was going to track the intruder, who was prowling the Internet. The activity usually began around midafternoon, Eastern time, broke off in the mid-1980's, a Los Angeles police detective said he had obtained by eavesdropping on the network -- a fact that the calls were being placed from near the Raleigh-Durham airport. By 1 A.M. Monday, he had an advantage: it could watch the intruder did not have access to protected computer resources and seize control of three telephone-company central offices in Manhattan and all the phone with his lawyer. But when an agent took the receiver, the line went dead. live. Taunting It messages took for the quarter, and tried to harass a friend and partner in crime by pretending to be living somewhere in Southern California, Mr. Mitnick is a computational physicist with a second Sprint technician. [words: 235]