Knowledge of number theory and abstract algebra are pre-requisites for any engineer designing a secure internet-based system.
However, most of the books currently available on the subject are aimed at practitioners who just want to know how the various tools available on the market work and what level of security they impart. These books traditionally deal with the science and mathematics only in so far as they are necessary to understand how the tools work.
Internet Security differs by its assertion that cryptography is the single most important technology for securing the Internet. To quote one reviewer "if every one of your communication partners were using a secure system based on encryption, viruses, worms and hackers would have a very hard time". This scenario does not reflect the reality of the Internet world as it currently stands. However, with security issues becoming more and more important internationally, engineers of the future will be required to design tougher, safer systems

Secure Windows 2000 Server, Windows XP systems, and Windows Server 2003. The book explains how to follow reference matrixes of useful services for Windows and UNIX. Plus, you’ll learn best practices for trace routing and source address location.

"Surprisingly complete. I have found this book to be quite useful and a great time-saver. There is nothing more irritating than thrashing in a search engine trying to remember some obscure tool or an obscure tool's obscure feature. A great reference for the working security consultant."
- Simple Nomad - Renowned Security Researcher and Author of The Hack FAQ

"While a little knowledge can be dangerous, no knowledge can be deadly. HackNotes: Network Security Portable Reference covers an immense amount of information readily available that is required for network and system administrators, who need the information quickly and concisely. This book is a must-have reference manual for any administrator."
- Ira Winkler - Chief Security Strategist at HP, security keynote speaker and panelist

A comprehensive introduction to the techniques of exploitation and creative problem-solving methods commonly referred to as "hacking," Hacking: The Art of Exploitation is for both technical and non-technical people who are interested in computer security. It shows how hackers exploit programs and write exploits, instead of just how to run other people's exploits. Unlike many so-called hacking books, this book explains the technical aspects of hacking, including stack based overflows, heap based overflows, string exploits, return-into-libc, shellcode, and cryptographic attacks on 802.11b. If you're serious about hacking, this book is for you.
Click here for code from the book

Defend I.T.: Security by Example draws on detailed war stories to identify what was done right and what was done wrong in actual computer-security attacks, giving you the opportunity to benefit from real experiences. Approaches to securing systems and networks vary widely from industry to industry and organization to organization. By examining a variety of real-life incidents companies are too embarrassed to publicly share, the authors explain what could have been done differently to avoid the losses incurred--whether creating a different process for incident response or having better security countermeasures in place to begin with.

Inside, you'll find in-depth case studies in a variety of categories:

• Basic Hacking: Blackhat bootcamp, including mapping a network, exploiting vulnerable architecture, and launching denial-of-service attacks
• Current Methods: The latest in malicious deeds, including attacks on wireless networks, viruses and worms, and compromised Web servers
• Additional Items on the Plate: Often overlooked security measures such as developing a security policy, intrusion-detection systems, disaster recovery, and government regulations
• Old School: Classic means of compromising networks--war dialing and social engineering

Infamous criminal hacker turned computer security consultant Mitnick offers an expert sequel to his best-selling The Art of Deception, this time supplying real-life rather than fictionalized stories of contemporary hackers sneaking into corporate servers worldwide.