UNDERGROUND

been a security incident at your site'. The circle was closing in on him. It was definitely time to get the hell out. He packed up his things in a hurry. Killed off the remaining sniffer. Moved his files. Removed the login patch. And departed with consider- able alacrity.

After he cut his connection, Anthrax sat wondering about the admins. If they knew he was into their systems, why did they leave the sniffers up and running? He could understand leaving the login patch. Maybe they wanted to track his movements, determine his motives, or trace his connection. Killing the patch would have simply locked him out of the only door the admins could watch. They wouldn't know if he had other backdoors into their system. But the sniffer? It didn't make any sense.

It was possible that they simply hadn't seen the sniffer. Leaving it there had been an oversight. But it was almost too glaring an error to be a real possibility. If it was an error, it implied the admins weren't actually monitoring the connec- tions in and out of their systems. If they had been watching the connections, they would probably have seen the sniffer. But if they weren't monitoring the connections, how on earth did they find out his special password for the login patch? Like all passwords on the system, that one was encrypted. There were only two ways to get that password. Monitor the connection and sniff it, or break the encryption with a brute-force attack.

Breaking the encryption would probably have taken millions of dollars of computer time. He could pretty well rule that option out. That left sniffing it, which would have alerted them to his own sniffer. Surely they wouldn't have left his sniffer running on purpose. They must have known he would learn they were watching him through his sniffer. The whole thing was bizarre.

Anthrax thought about the admins who were chasing him. Thought about their moves, their strategies. Wondered why. It was one of the unsolved mysteries a hacker often faced - an unpleasant side of hacking. Missing the answers to certain ques- tions, the satisfaction of a certain curiosity. Never being able to look over the fence at the other side.