Computer System and Network Security

Distrust and caution are the parents of security.
— Benjamin Franklin
We will bankrupt ourselves in the vain search for absolute security.
— Dwight D. Eisenhower
These pages are always being updated

This page remains under construction, just as your information security policy should. This material is an addition to any reference material provided elsewhere. This forum provides additional information, and lists references and URL's that come up during some courses I teach. Also check out Purdue's CERIAS project and its hotlist: http://www.cerias.purdue.edu/coast/hotlist/

Remember that installing some tools, and even taking security quite seriously on an on-going basis, does not make you secure! Maybe a little more secure (or, for the pessimists in the crowd, a little less at risk), but there is no such thing as a completely safe system. Hence some lawyer repellent, er, I mean, disclaimer:

The following are no more than suggestions. There is no guarantee that they will make your system secure. Mention here of a commercial product is by no means an endorsement — I'm just trying to direct you to several available tools, and I may have only one such example handy right now.

Use this information as a tool, in addition to what you have already learned.

Fundamentals

Just Enough Cryptography Cryptographic algorithms, digital signatures, cryptographic hashes, the basics of how they work
How to Verify Digital Signatures
TCP/IP My pages with some TCP/IP details.
How Does NAT (Network Address Translation) Work?

Information Security

Privacy and Data Integrity Tools PGP & Gnu Privacy Guard, Key Recovery, RADIUS, Risks of Google, Sanitizing Media, Secure Online Data Storage, Information Leakage, Commercial Cryptography, SSH, Secure FTP, Hardware Encryption, Voice Scramblers, Cryptography and International Law, X Privacy and xspy, IPSec, VPN's, Spyware
Government and Industry Regulations HIPAA, Sarbanes-Oxley (Sarbox/SOX), PCI (Payment Card Industry)
Availability Tools Real costs of data loss, Remote and local archiving, Disk longevity and failure rates, Laptop theft prevention, Fighting spam, WAN availability
Computer Forensics
Public Key Infrastructure (PKI) Providers

User Authentication

Authentication Tools Well-known default passwords, Rainbow Tables, Comparing OS user authentication strength, Kerberos, Password tools, sudo, Tokens, Biometrics

System Security (operating system auditing and hardening)

System Security Auditing and Monitoring Tools TARA, COPS, Titan, Bastille, ISS tools, Password Testing and Cracking
OS-Specific Security Issues Cisco IOS, Linux, Solaris, Tru64 (ULTRIX, OSF/1), IRIX, AIX, DOS, Macintosh, Novell, AS/400, VMS, Windows
Intrusion Detection Tools Tripwire, AIDE, Snort, RazorBack, ACID-XML, SNARE, BackLog, NetRanger, NetStalker, GrIDS
Analyzing multiple intrusions into a poorly configured Linux system
Hardware Exploits

Network Security

Network Security Auditing Tools Top 100 Network Security Tools, Lists of TCP ports used by attacks, Port scanners, Network vulnerability testing, DNS security, Automatic Teller Machine (ATM) security
Network Monitoring / Sniffing Tools Unix-based, DOS/Windows-based, switch spoofing, Wireless LAN/WAN security, WLAN antenna construction, attack detection
Firewall Tools Unix/Linux-based, Windows based, Home / Small-Office Firewall, Commercial vendors
How to set up and use SSH
Web Security
TCP/IP Stack hardening
SSH Attacks Observed on the Internet

Malware, Social Engineering, and Software Security

Why HTML E-mail is Dangerous
Analyzing a "Phishing" Scam Attempt
SonicWALL's great "Phishing" Analysis Quiz
Analyzing Hostile Data An overview of viruses, worms, trojans, downloaders and other malware, plus analysis of:
Bagel, Mytob, Mydoom, The Russian M.O.B., and more
Fighting Internet Hoaxes
Software Security Tools Buffer Overflows, Writing Safe Code, C/C++ Security, Python Security, Java Security, ActiveX Attacks, Writing Exploit Code

Reference Material

Security-Related RFCs (Valuable Documents!)
and Mitre nomenclature projects
Reference Books, Journals
Infosec Bulletins
General Information Big-Money Losses, Military "Net-Centric Warfare", Incidents and Anecdotes, Government Warnings and Reactions, Interent Banking, COMSEC and GSM/mobile hacking, Offensive Information Warfare / Information Operations
Other Organizations' Policies
Infosec Response Teams Incident Response Teams, Assistance and Guidance, Research and Development, Vendors, Risk Management and Insurance Coverage
The Government Surveillance Agencies CESID, CIA, CSE, CSIS, DIA, DSD, FBI, FSB, GCHQ, IKSI, NIMA, NSA, NRO, EIEIO...
Keeping Track of the Bad Guys Classic Hackers, Hacker Technology
Downright Scary Threats Separatists, para-military, military, and intelligence organizations
Cryptographic History WWII German Enigma system and its weaknesses, WWII and Cold War tourism
The Gallery of Crash Dump Screens

Where to go from here

Make sure you understand your systems well, and set them up properly! As Hippocrates said, "Primum non nocere", or "First, do no harm."


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