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Review For: "Perfect Passwords: Selection, Protection, Authentication", ISBN 1597490415, by Mark Burnett, 2006Despite being (as of this writing) over FIFTEEN YEARS old, this book is remarkably relevant, even today!That's because Mr. Burnett not only did his homework, he also crunched the numbers, and thus reached conclusions which were YEARS ahead of their time -- conclusions which for the most part remain valid to this very day.There are LOTS and LOTS of tips and tricks in this book for forming long, memorable, and hard-to-crack passwords. BUT, if all you're interested in is the Meat-&-Potatoes, I can shortcut the matter and give it to you here: "The Perfect Password" has eight (8) elements to it:1. It has UPPERCASE letters (ABC...).2. It has lowercase letters (def...).3. It has numbers (123...).4. It has spaces (" ").5. It has punctuation (.,:;-!? and the like, usually used in sentences).6. It has symbols (@&+=>$#*^~ and the like, usually NOT used in sentences).7. It has respelling (i.e., no words that can be found in adictionary -- for example, using "kwean", and not "queen").8. It has more than 16 characters, and the more the better.That's it, Jack! If you can easily come up -- on the spur of the moment -- with a passphrase or password which meets ALL of these criteria, AND which is easy for you to remember... then YOU DON'T NEED TO BUY THIS BOOK at all, you've already got it made!Otherwise, the aforementioned Tips & Tricks will come in very very handy.AND not only that, it's (surprisingly!) entertaining, too! For example, there's the anecdote about the author's 5-year-old son, whose password was:"ooooooooooooooo"(Shux, his son liked the letter "o", and he could count to the minimum password length of 15, so that's what the lil' kidlet tyke used, LOL!)For those with Kindles, a Kindle version of this book is available: Click Here.Buy this book. Please trust me, you won't be sorry. :)