It is absolutely true that people make passwords hard to remember because they think they are "safer", and it is certainly true that length, all other things being equal, tends to make for very strong passwords and this can be confirmed by using rumkin.com's password strength checker. Aurich Lawson. It's not all that hard to turn a mediocre password into a great one.

70.24.167.3 13:27, 30 September 2013 (UTC). This is an XKCD inspired password generator. To prove the point, we gave them the same list and watched over their shoulders as they tore it to shreds.

Using such symbols was again visited in one of the tips in 1820: Security Advice. Guy [[Holding Laptop]]: His laptop's encrypted. Can I install 120v and 240v receptacles behind the same two-pole breaker? How do I substitute almond flour for all purpose flour? Yes, the XKCD system will be just as weak as other approaches, if you let users pick the password. Ad Choices. (You can add a few more bits to account for the fact that this is only one of a few common formats.) [[Highlighting the first letter - 1 bit of entropy.]] It's the passphrase equivalent of "password123". So what makes a good password? For a pass phrase to be effective, though, it needs to be not only long and memorable, but also difficult to guess by others (even those who know you).

44 bits. Even if the individual characters are all limited to [a-z], the exponent implied in "we added another lowercase character, so multiply by 26 again" tends to dominate the results. ~28 bits of entropy ), which, is then of complexity 30^4 + 96^4, versus 96^23 for the random password. One problem with this approach is that there's no guarantee your random selection of words will be unique from other entries already in the output.txt file. This is way too random and unoptomized for a password cracking approach unless I'm missing something. According to yesterday’s xkcd strip, such phrases are hard to guess (even by brute force), but easy to remember, making them interesting password … 25 random lowercase characters would have 117 bits of entropy, vs 44 bits for the common words list. Look at the number of bits displayed in the image: 11 bits for each word. the time it takes to wait is 2^n. This indicator also shows hints when hovering the mouse cursor over it. Steve Gibson basically gets it, but calculates entropy incorrectly in order to promote his own method and upper-bound password-checking tool: Computer security consultant Mark Burnett. "but it gets real ugly if you need to do more than 2 word phrases [....]" and

The No. SteveMB 18:35, 30 August 2013 (UTC), Followup: The results of extracting the first letters of words in sample texts (the Project Gutenberg texts of The Adventures of Huckleberry Finn, The War of the Worlds, and Little Fuzzy) and applying a Shannon entropy calculation were 4.07 bits per letter (i.e.

Mackatronic (talk) 08:23, 9 January 2015 (UTC). As big as the word lists that all three crackers in this article wielded—close to 1 billion strong in the case of Gosney and Steube—none of them contained "Coneyisland9/," "momof3g8kids," or the more than 10,000 other plains that were revealed with just a few hours of effort. Generates random permutations of input lines to standard output. Even if you think your pet's name is rare and choose SenorFluffypants as a password, that information would be easy for an adversary to find on, say, Facebook. No, Troubador. Information Security Stack Exchange is a question and answer site for information security professionals. {{Alt-Text: Actual Actual Reality: Nobody really cares about his secrets. With faster processing, and programming rules that add characters and punctuation to a word list, a hacker could crack that password in just 12 hours. I wanted all this, plus it doesn't store the array in memory (it would run out quick with a long list) and doesn't write to disk (although you can redirect the output if you want). This work is licensed under a Punctuation [[Highlighting the symbol appended to the word - 4 bits of entropy.]] Caps? [[A person is thinking, in their thought bubble a horse is standing to one side talking to an off-screen observer.

Passphrases are easier to remember and more secure than traditional passwords.

Because passwords are annoying and tedious to keep track of, most of us resist changing our obvious passwords, many of which can be found in leaked databases. Yes, a CPU-based attack is unlikely to be feasible for a 4-word passphrase (although for a 3-word passphrase it might only take months). "correct horse battery staple" is a better passphrase than r0b0tz26.”, Online security for a banking site has been informed by an online comic. Can I put a 6" hole in this ceiling joist? Additionally, turn on two-factor authentication wherever possible, especially for bank and email accounts, your password manager, and online storage sites.

The results, to say the least, were eye opening because they show how quickly even long passwords with letters, numbers, and symbols can be discovered. What's more, like the other two crackers profiled in this article, radix didn't know where the password list was taken from, eliminating one of the key techniques crackers use when deciphering leaked hashes. When used as WiFi key, agencies employing a GPU-array with 128 GPUs, could recover The list of "plains," as many crackers refer to deciphered hashes, contains the usual list of commonly used passcodes that are found in virtually every breach involving consumer websites. To learn more, see our tips on writing great answers. The passwords that the FBI wants you to stop using are both simple and easy to remember ones, which are also easy to guess or break, and even more complex combinations of … make me wonder whether you estimated the time to crack if the tool would exists and even if it would perform at a rate comparable to password cracking on GPUs. That means that counterexample "J4I/tyJ&Acy" does have 72bits, but nonetheless is irrelevant to character/personage strategy of choosing a memorable yet strong password. A full password should not be topic of discussion. A joke in German that I don't understand. --162.158.91.236 17:31, 19 September 2015 (UTC), Interesting read about the generated password streangth: https://www.schneier.com/blog/archives/2016/01/friday_squid_bl_508.html#c6714590 162.158.91.190 08:09, 8 January 2016 (UTC), Originally I logged in to report a local xkcd related phenomenon, and ask if anyone else had experienced it. Xhfz (talk) 21:37, 11 March 2014 (UTC), This comic was mentioned in a TED talk by Lorrie Faith Cranor on in March 2014. The free, open-source database works offline and offers a variety of security features such as a key file, a master password in a digital file stored on your hard drive, and protection of that password against dictionary attacks. Relatedly, hard-to-remember passwords leave users uncertain whether their password has been changed by someone else or they've just forgotten it.

What she doesn't mention is the frequency of changing passwords - in most organizations it's ~90 days. 108.162.218.95 15:17, 11 February 2014 (UTC), The explanation said that the comic uses a dictionary[6].

Other guy: No good! If all else fails, there's potential in our brains: Researchers are working on training systems that teach humans to store random 30-character passwords in their subconscious. shuf -n5 /usr/share/dict/words | tr -d '\n' | john --pipe mypasswd*. This means you're free to copy and share these comics (but not to sell them).

In addition to being easier to remember, long strings of lowercase characters are also easier to type on smartphones and soft keyboards. I've personally tried it and was able to crack 3/10 wifi networks near me. I don't know where that standard originated, but (as a sys admin) I suspect it's about as ineffective as most of our other password trickery - that is that it does nothing. ((The comic illustrates the relative strength of passwords assuming basic knowledge of the system used to generate them. The most serious attack is called offline password guessing. Web comic xkcd notes that "through 20 years of effort, we've successfully trained everyone to use passwords that are hard for humans to remember, but easy for computers to guess." ; 3 = common substitutions; 4 = punctuation, Go to random.org and select 4 random integers between 1 and 2048; then go to your list of common words, Thanks to this comic, this is now one of the first passwords a hacker will try. This page was last edited on 24 May 2020, at 11:16. Difficulty to remember: Hard.

There are ways to make passwords both secure and memorable. 172.68.215.113 13:17, 23 February 2020 (UTC). The increasing power of hardware and specialized software makes it trivial for crackers to combine these ingredients in literally billions of slightly different permutations. My second idea was to use Crunch to pipe in the words, for example...crunch 0 0 -p word1 word2 | john --pipe mypasswd* I could modify that a bit and use -q wordlist.txt and crunch would use the words from that text file. 2^28 = 3 days at 1000 guesses Using a pass phrase of random words, such as correcthorsebatterystaple (as popularized by the xkcd Web comic) is significantly harder for a computer to guess than something like Tr0ub4dor&3—while also being easy for a human to memorize.

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