Password Cracking / Brute-Force Tools Password Cracking / Brute-Force Tools
Color profile: Disabled Hacking / Anti-Hacker Tool Kit, 3rd Ed / Shema, Davis, Cowen & Philipp / 226286-9 / Chapter 8 Composite Default screen Presented by: 8 PasswordPassword CrackingCracking // Brute-ForceBrute-Force ToolsTools 195 Reproduced from the book “Anti-Hacker Tool Kit, Third Edition." Copyright © 2006, The McGraw-Hill Companies, Inc. Reproduced by permission of The McGraw-Hill Companies, Two Penn Plaza, NY, NY 10121-2298. Written permission of The McGraw-Hill Companies, Inc. is required for all other uses. P:\010Comp\Hacking\286-9\ch08.vp Monday, January 23, 2006 12:28:07 PM Color profile: Disabled Hacking / Anti-Hacker Tool Kit, 3rd Ed / Shema, Davis, Cowen & Philipp / 226286-9 / Chapter 8 Composite Default screen 196 Anti-Hacker Tool Kit smile, a house key, a password. Whether you’re trying to get into a nightclub, your house, or your computer, you will need something that only you possess. On a Acomputer network, users’ passwords have to be strong enough so that Dwayne can’t guess Norm’s password and Norm can’t steal Dwayne’s password (since Dwayne might have written it on the bottom of his keyboard). Bottom line—one weak password can circumvent secure host configurations, up-to-date patches, and stringent firewall rules. In general an attacker has two choices when trying to ascertain a password. He can ob- tain a copy of the password or hash if encrypted and then use brute-force tools to crack the encrypted hash. Or he can try to guess a password. Password cracking is an old technique that is most successful because humans are not very good random sequence generators.
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