Showing posts with label encryption. Show all posts
Showing posts with label encryption. Show all posts

Gray Hat Hacking : The Ethical Hacker's Handbook Review

Gray Hat Hacking : The Ethical Hacker's Handbook
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Gray Hat Hacking : The Ethical Hacker's Handbook Review'Gray Hat Hacking' (GHH) is positioned as a next-generation book for so-called ethical hackers, moving beyond the tool-centric discussions of books like 'Hacking Exposed.' The authors leave their definition of 'gray hat' unresolved until ch 3, where they claim that a 'white hat' is a person who 'uncovers a vulnerability and exploits it with authorization;' a 'black hat' is one who 'uncovers a vulnerability and illegally exploits it and/or tells others how to;' and a 'gray hat' is one who 'uncovers a vulnerability, does not illegally exploit it or tell others how to do it, but works with the vendor.' I disagree and prefer SearchSecurity.com's definitions, where white hats find vulnerabilities and tell vendors without providing public exploit code; black hats find vulnerabilities, code exploits, and maliciously attack victims; and gray hats find vulnerabilities, publish exploits, but do not illegally use them. According to these more common definitions, the book should have been called 'White Hat Hacking.' I doubt it would sell as well with that title!
Content-wise, the book mixes ethical and legal advice with tool overviews and technical information. Many reviewers note the good legal overview in ch 3, where I found the tables summarizing various laws to be helpful. The authors provide a sound rationale for penetration testing: 'Nothing should be trusted until it is tested' (p. 13). I enjoyed the disclosure discussion in ch 3 as well. I liked the brief tool descriptions of Core IMPACT, Immunity Security's CANVAS, and the Metasploit Framework. Some of the other discussions (e.g., Amap, P0f, Ettercap) didn't go deeper than already published explanations of those same tools.
I found the technical material to be accurate albeit somewhat disorganized and in some cases far too shallow. For example, the authors provide 6 pages on Python (ch 6), 6 pages on C (ch 7), and a single 21 page chapter (ch 10) mentioning system calls, socket programming, and assembly language. On p 279 and several other places the authors admit their topic 'deserves a chapter to itself, if not an entire book!' They should have trusted their instincts and required readers to have prior knowledge of programming in low- and high-level languages prior to reading GHH. Instead, short sections that are too basic for the pros but too rushed for beginners detract from the book's focus.
The five authors clearly know their subjects, but they should have coordinated their chapters better. For example, ch 7 introduces using debuggers without even a description of their purpose. Six chapters later (in ch 13), we read a description of debugging only to be followed again by another discussion of debugging in ch 14. All of this should have been consolidated and rationalized.
I think McGraw-Hill/Osborne's second edition of GHH should seek to differentiate itself from more focused books like 'The Shellcoder's Handbook' (by Wiley) and 'Exploiting Software' (by Addison-Wesley). There is a market for high-end security books without sparse introductory material included for the benefit of beginners. Authors should either commit to the beginners and give enough information to enlighten them, or tell them to read foundational references first and concentrate on the more experienced audience. Authors like Allen Harper and Chris Eagle, winners of last year's 'Capture the Flag' contest at Def Con, can deliver the goods if not constrained by a publisher's desire to address as broad an audience as possible. I would not be surprised to see this book greatly expanded in a second edition, which I look forward to reading.Gray Hat Hacking : The Ethical Hacker's Handbook OverviewAnalyze your company's vulnerability to hacks with expert guidance from Gray Hat Hacking: The Ethical Hacker's Handbook. Discover advanced security tools and techniques such as fuzzing, reverse engineering, and binary scanning. Test systems using both passive and active vulnerability analysis. Learn to benefit from your role as a gray hat. Review ethical and legal issues and case studies. This unique resource provides leading-edge technical information being utilized by the top network engineers, security auditors, programmers, and vulnerability assessors. Plus, the book offers in-depth coverage of ethical disclosure and provides a practical course of action for those who find themselves in a "disclosure decision" position.

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Investigator's Guide to Steganography Review

Investigator's Guide to Steganography
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Investigator's Guide to Steganography ReviewAs a security focused manager the more I learn about steganography, the art of hiding messages, the more concerned I become about its security implications. These techniques allow an individual to use secrecy in communications.
I am sure the book aids the investigator, but it helps a manager understand how secrecy has been used in the past and the present as well. A tremendous amount of research must have gone into the book to be so comprehensive. I was already familiar with S-tools and a few other picture file related techniques, but had never considered slight alterations of the space between letters and had never heard of Civil war quilts. The beginning of the book is packed with technique after technique.
The author, Greg Kipper is to be congratulated for such clear writing especially considering how complex the subject gets.
The publisher, CRC Press, went the extra mile to create a very detailed table of contents so the reader can find what they need fast.
The bottom line, this book is an excellent coverage of the subject and yet they packed it into about 200 pages so it is 100% fluff free.
One concern and one wish. The coverage of tools is a bit spotty, the links to stego tools seem to change rapidly and some of the tools do not even have a link. If you can't find a tool you might try: http://www.stegoarchive.com/ that is what I use. I hope this goes to second edition and if so, my wish is that the author will beef up the detection chapter. Greg does such a great job of showing how stego can and has been used in the real world, I would love more information about how I can protect myself and apply detective controls in my organization's network.Investigator's Guide to Steganography OverviewInvestigators within the law enforcement and cyber forensics communities are generally aware of the concept of steganography, but their levels of expertise vary dramatically depending upon the incidents and cases that they have been exposed to. Now there is a book that balances the playing field in terms of awareness, and serves as a valuable reference source for the tools and techniques of steganography.The Investigator's Guide to Steganography provides a comprehensive look at this unique form of hidden communication from its earliest beginnings to its most modern uses. The book begins by exploring the past, providing valuable insight into how this method of communication began and evolved from ancient times to the present day. It continues with an in-depth look at the workings of digital steganography and watermarking methods, available tools on the Internet, and a review of companies who are providing cutting edge steganography and watermarking services. The third section builds on the first two by outlining and discussing real world uses of steganography from the business and entertainment to national security and terrorism. The book concludes by reviewing steganography detection methods and what can be expected in the future. It is an informative and entertaining resource that effectively communicates a general understanding of this complex field.

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