Hackers versus crackers -- Hacking Windows -- Network hacking -- Email hacking -- Instant messenger hacking -- Web hacking -- Input validation attacks -- Buffer overflows -- Intellectual property theft -- Social engineering attacks -- Password cracking attacks -- TCP/IP : a mammoth description -- Identity attacks -- Denial of service (DOS) attacks -- Cryptography, firewalls, and error messages -- Batch file programming -- Viruses torn apart -- How does a virus work? -- The Perl manual -- Exploits, scripts, and vulnerabilities.