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Thinking Security: Stopping Next Year’s Hackers by Steven M. Bellovin

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Chapter 4. Antivirus Software

“Let me put it another way. You have a computer with an auto-dial phone link. You put the VIRUS program into it and it starts dialing phone numbers at random until it connects to another computer with an auto-dial. The VIRUS program then injects itself into the new computer. Or rather, it reprograms the new computer with a VIRUS program of its own and erases itself from the first computer. The second machine then begins to dial phone numbers at random until it connects with a third machine. You get the picture?

. . .

“It’s fun to think about, but it was hell to get out of the system. The guy who wrote it had a few little extra goodies tacked onto it—well, I won’t go into any detail. I’ll just tell you that he also ...

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