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309 lines
13 KiB
HTML
309 lines
13 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<meta http-equiv="X-UA-Compatible" content="IE=edge">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<!-- The above 3 meta tags *must* come first in the head; any other head content must come *after* these tags -->
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<title>Diceware: Create Secure Passwords You Can Actually Remember!</title>
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<!-- Bootstrap -->
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<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css" rel="stylesheet">
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<link href="./starter-template.css" rel="stylesheet">
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<!-- Our different dice faces. -->
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<link href="./dice.css" rel="stylesheet">
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<!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries -->
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<!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
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<!--[if lt IE 9]>
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<script src="https://oss.maxcdn.com/html5shiv/3.7.2/html5shiv.min.js"></script>
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<script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
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<![endif]-->
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<meta property="og:title" content="Diceware: Generate Secure Passwords You Can Actually Remember!" />
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<meta property="og:description" content="Diceware is a password generator which creates passwords based on dicerolls keyed to a set of words." />
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<meta property="og:url" content="https://www.dmuth.org/diceware/" />
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<meta property="og:image" content="https://www.dmuth.org/diceware/dice.jpg" />
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<meta name="twitter:card" content="summary_large_image" />
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<meta name="twitter:site" content="@dmuth" />
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<meta name="twitter:url" content="https://www.dmuth.org/diceware/" />
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<meta name="twitter:title" content="Diceware: Generate Secure Passwords You Can Actually Remember!" />
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<meta name="twitter:description" content="Diceware is a password generator which creates passwords based on dicerolls keyed to a set of words." />
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<meta name="twitter:image" content="https://www.dmuth.org/diceware/dice.jpg" />
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</head>
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<body>
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<div class="container">
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<a id="github_ribbon" style="display: none; " href="https://github.com/dmuth/diceware"
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><img style="position: absolute; top: 0; right: 0; border: 0;" src="https://camo.githubusercontent.com/365986a132ccd6a44c23a9169022c0b5c890c387/68747470733a2f2f73332e616d617a6f6e6177732e636f6d2f6769746875622f726962626f6e732f666f726b6d655f72696768745f7265645f6161303030302e706e67" alt="Fork me on GitHub" data-canonical-src="https://s3.amazonaws.com/github/ribbons/forkme_right_red_aa0000.png"></a>
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<div class="starter-template">
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<h1>Diceware Password Generator</h1>
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<p class="lead">
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Generate high-entropy passwords the easy way!
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</p>
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<!-- This row is completely hidden, but is used to hold elements
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that get cloned after a dice roll. -->
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<div class="row source" style="display: none; ">
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<div class="col-md-12" style="height: 0px; ">
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<div class="die dice1 dice_element" style="float: left; ">
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<div class="dot center"></div>
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</div>
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<div class="die dice2 dice_element" style="float: left; ">
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<div class="dot dtop dleft"></div>
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<div class="dot dbottom dright"></div>
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</div>
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<div class="die dice3 dice_element" style="float: left; ">
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<div class="dot dtop dleft"></div>
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<div class="dot center"></div>
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<div class="dot dbottom dright"></div>
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</div>
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<div class="die dice4 dice_element" style="float: left; ">
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<div class="dot dtop dleft"></div>
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<div class="dot dtop dright"></div>
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<div class="dot dbottom dleft"></div>
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<div class="dot dbottom dright"></div>
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</div>
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<div class="die dice5 dice_element" style="float: left; ">
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<div class="dot dtop dleft"></div>
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<div class="dot dtop dright"></div>
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<div class="dot center"></div>
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<div class="dot dbottom dleft"></div>
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<div class="dot dbottom dright"></div>
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</div>
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<div class="die dice6 dice_element" style="float: left; ">
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<div class="dot dtop dleft"></div>
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<div class="dot dtop dright"></div>
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<div class="dot center dleft"></div>
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<div class="dot center dright"></div>
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<div class="dot dbottom dleft"></div>
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<div class="dot dbottom dright"></div>
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</div>
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<div class="dice_word dice_element" style="float: left; padding-left: 20px; padding-top: 25px; ">
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</div>
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<div class="results_words_key" >Your words are: </div>
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<div class="results_words_value" ></div>
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<div class="results_phrase_key" >Your passphrase is: </div>
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<div class="results_phrase_value" ></div>
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<div class="results_num_possible_key" ># of possible passwords: </div>
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<div class="results_num_possible_value" ></div>
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</div>
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<div class="alert alert-danger bad_crypto" role="alert">
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<span class="glyphicon glyphicon-exclamation-sign" aria-hidden="true"></span>
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<span class="sr-only">Error:</span>
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Whoa there! Your browser doesn't have the getRandomValues() function.
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This means that dice rolls you make <em>will not be cryptogrpahically secure!</em><br/>
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Please try another browser. Otherwise, proceed at your own risk.
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</div>
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</div> <!--/ row -->
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<div class="row">
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<div class="col-md-12">
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<div class="message" ></div>
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<h2 class="dice_num">
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Number of Dice Rolls:
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</h2>
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<div class="btn-group-lg" role="group" aria-label="...">
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<button id="button-dice-2" type="button" class="btn btn-default dice_button">2</button>
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<button id="button-dice-3" type="button" class="btn btn-default dice_button">3</button>
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<button id="button-dice-4" type="button" class="btn btn-default dice_button active">4</button>
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<button id="button-dice-5" type="button" class="btn btn-default dice_button">5</button>
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<button id="button-dice-6" type="button" class="btn btn-default dice_button">6</button>
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<button id="button-dice-7" type="button" class="btn btn-default dice_button">7</button>
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<button id="button-dice-8" type="button" class="btn btn-default dice_button">8</button>
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</div>
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<br/>
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<a name="roll_dice_button" ></a>
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<button type="button" class="btn btn-default btn-lg btn-primary" id="roll_dice">
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<span class="glyphicon glyphicon-play" aria-hidden="true" ></span> Roll Dice!
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</button>
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</div>
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</div><!-- /row -->
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<p/>
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<div class="row">
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<div class="col-md-12" >
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<div class="results">
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</div>
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</div>
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</div><!-- /row -->
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<div class="row" style="text-align: left;">
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<div class="col-md-12">
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<h3>About Diceware</h3>
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Weak passwords are a big flaw in computer security due to a lack of "entropy"
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or randomness. For example, how many times have you used the name of a pet or relative or street
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in a password, or perhaps the number "1"? Not very random, is it? :-)
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Worse still, if
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passwords are reused between services, <a href="http://www.businessinsider.com/biggest-password-mistake-2014-8"
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>that increases your security risk</a>. This is not theoretical, <a href="http://www.techspot.com/news/65255-hackers-access-github-accounts-reusing-passwords-previous-leaks.html"
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>this has already happened.</a>
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</p>
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Fact is, humans are terrible at remembering random combiations of letters and
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numbers, but we are great at remembering phrases of words. That's where Diceware comes in.
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</p>
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This Diceware web app is based on the proposal at <a href="http://world.std.com/~reinhold/diceware.html">http://world.std.com/~reinhold/diceware.html</a>
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wherein virtual dice are roled 5 times, and the 5 digit number used against a lookup table of words.
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4 dice rolls gives you 4 random words which are easy for a human being to remember, yet have
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a high amount of entropy which makes them hard to crack.
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</p>
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For more information on Diceware:
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<ul>
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<li><a href="http://world.std.com/~reinhold/diceware.html">The Diceware Passphrase FAQ</a></li>
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<li><a href="http://world.std.com/~reinhold/diceware.wordlist.asc">Original Diceware word list</a> (This implementation uses <a href="#wordlist">a different wordlist...</a>)</li>
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<li><a href="http://world.std.com/~reinhold/diceware.txt">Diceware for Passphrase Generation and Other Cryptographic Applications</a></li>
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</ul>
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For more information on the entropy in passphrases, I'd like to refer you
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<a href="https://xkcd.com/936/">to this XKCD comic</a>.</p>
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Diceware is a trademark of Arnold Reinhold.
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<h3>FAQ: Why not use LastPass or a similar product?</h3>
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By all means, feel free to do so. LastPass is an excellent product and I highly recommend it.
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That said, there's no reason that Diceware cannot be used concurrently with LastPass. Personally,
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I like passwords that I can remember.
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<h3>"I can't believe you're sending passwords over the Internet!"</h3>
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<a href="dude-chill-just-chill.gif">Chill</a>. I'm not. Passwords are generated within your browser and do not leave it (unless you copy them out yourself).
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<h3>FAQ: Are these dice rolls cryptographically secure?</h3>
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Yes, insofar as we're using the
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<a href="https://developer.mozilla.org/en-US/docs/Web/API/RandomSource/getRandomValues">getRandomValues() function in Javascript</a>,
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and you trust that your
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browser and computer have not been compromised or otherwise tampered with. Keep in mind that a not-so-theoretical attack
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would be for an attacker to compromise the random number generator on your computer so that
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anything that is encrypted (or passkeys generated) would be suspectible to less intense cryptoanalysis.
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<h3>FAQ: Is the source available?</h3>
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Yep! You can grab a copy at <a href="https://github.com/dmuth/diceware">https://github.com/dmuth/diceware</a>
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</p>
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In fact, if you are nervous about generating a password on a website (even though the password is actually
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generated by Javascript in your browser), I would encourage you to download the source and run it locally.
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</p>
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If you do want to run Diceware locally, just download the source and run a webserver in Python with
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this command: <tt style="background-color: #dddddd; ">python -m SimpleHTTPServer 8000</tt>. You will then able to access DiceWare at
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<a href="http://localhost:8000/">http://localhost:8000/</a>.
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<a name="debug"></a>
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<h3>FAQ: Is there a way to roll the dice automatically?</h3>
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Yes, there is. Append "?debug=n" to the URL to automatically roll the dice N times.
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<p/>
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<p/>
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Examples: <a href="?debug=4">Roll the Dice 4 times.</a>
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<a href="?debug=5">Or 5 times.</a>
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<a href="?debug=6">Or even 6 times!</a>
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<p/>
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<a name="wordlist"></a>
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<h3>FAQ: Can you tell me more about the list of words?</h3>
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For rolls of 5 dice, I am now using <a href="https://www.eff.org/deeplinks/2016/07/new-wordlists-random-passphrases"
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>the worldlist from the EFF</a>. Substantial enhancements have been made over the original list
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designed to improve usability without compromising security.
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</p>
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</p>
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I started off using <a href="http://world.std.com/~reinhold/diceware.wordlist.asc">the original wordlist</a>,
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but it contained a lot of symbols, punctuation, numbers, and 2 and 3 letter words. I wanted to try a different
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wordlist with longer words, no non-alphabetic characters, and words more commonly used. So then I tried
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<a href="http://norvig.com/ngrams/">Peter Norvig's</a> list of <a href="http://norvig.com/ngrams/count_1w.txt"
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>the 1/3rd million most frequently used words</a>. Peter Norvig's list is still in use for when 6 or 7 dice are rolled.
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<h3>FAQ: How many dice are rolled per word?</h3>
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The default is 5 dice, which allows for 7,776 different words per roll. While I have some debug hooks
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in the code so that you can run Diceware with <a href="?dice=6">6 dice per word</a> and
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<a href="?dice=7">7 dice per word</a> (for 46,655 and 279,935 possible words, respectively), the words
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used become more obscure, which makes them more difficult to remember, so I'm not entirely sure that is a good thing.
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But for now, the functionality is there, if there is a desire for it.
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<h3>FAQ: Why did you change the wordlist?</h3>
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</p>
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I am always considering what words I use in the wordlist. I may opt to use shorter words in the future.
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<h3>Who built this? / Contact</h3>
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My name is <a href="http://www.dmuth.org/">Douglas Muth</a>, and I am a software engineer in Philadelphia, PA.
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</p>
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There are several ways to get in touch with me:
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<ul>
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<li>Email to doug.muth AT gmail DOT com or dmuth AT dmuth DOT org</li>
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<li><a href="http://www.facebook.com/dmuth">Facebook</a> and <a href="http://twitter.com/dmuth">Twitter</a></li>
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<li><a href="http://www.linkedin.com/in/dmuth">LinkedIn</a></li>
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<li><a href="https://github.com/dmuth/diceware/issues">Opening an Issue in GitHub</a>
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</ul>
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Feel free to reach out to me if you have any comments, suggestions, or bug reports.
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</div>
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</div>
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</div><!-- /starter-template -->
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</div><!-- /.container -->
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<!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->
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<script src="//ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
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<!-- Include all compiled plugins (below), or include individual files as needed -->
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<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.4/js/bootstrap.min.js"></script>
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<script src="./dist/bundle.js"></script>
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</body>
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</html>
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