Kaufman, Charlie. Network security : private communication in a public world / - 2nd ed. - Upper Saddle River, NJ : Prentice Hall PTR, c2002. - xxvi, 713 pages : Illustrations ; Includes index. ISBN: 0130460192 Subjects--Topical Terms: Computer security.Computers - access control.Electronic data processing departments - security measures.Computer networks - security measures. LC Class. No.: QA 76.9 / KAU