The shortest password allowed with WPA2 is 8 characters long. A password of 14 or 15 characters should be long enough to defeat most brute force guessing. WPA2 passwords can be up to 63 characters long. Of course, it is better to include both upper and lower case letters along with numbers. WPA2 passwords can also contain a host of special characters. WARNING: For Educational Purposes Only! BE AWARE Of This! I'm not responsible how you use this method by you or to you! This video explains you how to use Reaver and gain the WiFi password without.
How Long Does Reaver Take To Crack Wpa2 Key Finder
There are 3 basic methods of attack here. Dictionary attack, where the cracker attempts to guess the password/passphrase from a compiled 'dictionary' of common words. If the passphrase is composed of such words, it may be cracked in just a few hours. There's no easy way to calculate how long, since it depends on the dictionary size. For a pure brute force attack, which tries every possible key, it could take a few thousand years, depending on how much computing power is at the crackers disposal. For WEP, there are methods that greatly reduce the scope of a brute force attack to the point where it may only take a few hours, or even less, if weak initialization vectors are used. All 3 methods depend to a certain extent on chance.
It's POSSIBLE that a cracker could brute force attack a WPA key and discover it on the very first try. So even if statistically it would take several thousand years, there is no guarantee of that. For brute force attacks, theres a formula you can use to determine how probable it is to find your key.
How Long Does Reaver Take To Crack Wpa2 Keys
P = (L * R) / S where, P = Probability (between 0 and 1 [0% and 100%]) L = Maximum password lifetime R = Login attempt rate S = Size of password space Using your example of 20 random key values (assume: a-z, A-Z, 0-9 = 62 possible characters), assume you change your key once a year (31536000 seconds), and assume the hacker is capable of trying 1,000,000 passwords a second. L = 31536000 seconds R = 1,000,000 logins S = 62^20 = 7.0 * 10^35 P = (31536000 * 1,000,000) / (7.0 * 10^35) P = 4.5 * 10^-23 Thats a VERY small number. Basically its saying that the odds of someone guessing your password within a year is close to 0%. If you include other possible letters like ~,!, @, and so forth, that number gets even smaller. Now lets reverse the math. How many passwords per second would a hacker need in order to hack your key in a reasonable amount of time? Lets say he wants to hack you within a day.
P = 1 L = 86400 seconds R =? S = 7.0 * 10^35 P = (L * R) / S R = (P * S) / L R = 8.1 * 10^30 logins / second A hacker would need to try 8.1 * 10^30 passwords a second in order to guarantee a password by the end of the day. Suffice to say, were far from being able to process at such speeds. Fun with forumulas!
Someone check my math please. So how long would it take with today's computers to process 8.1E30 passwords of 20 characters (one second of what was needed)? Working with what was shared in the formula of assuming a computer can process 1,000,000 passwords per second I get: 8.1E10 (passwords) / 1,000,000 (passwords per second) = 8.10E24 seconds 8.10E24 / 60 (seconds) = 1.35E23 minutes 1.35E23 /60 (minutes) = 2.25E21 hours 2.25E21 / 24 (hours) = 9.38E19 days 9.38E19 / 365.25 (days) = 2.57E17 years 2.57E17 / 100 (years) = 2.57E15 centuries 257,000,000,000,000,000 centuries to process 8.1E30 passwords at 1,000,000 passwords per second. Even if we say that a P4 doing 12,000,000 instructions per second can do 12,000,000 passwords per second, it would take 21,400,000,000,000,000 centuries for that P4 to run through 8.1E30 passwords.
So brute force attacking the encryption of a reasonably strong password shouldn't be too easy? Said by: Excellent news. Put another way, the universe really isn't old enough for anyone to have broken a WPA key yet, even if they started right after the big bang. Yep but that is this week, the same was once said of WEP. WEP was standardized without scientific review of its foundations. WPA has been rigorously reviewed and tested-not just because WEP turned out to be so bad, but also because releasing a cryptological tool that hasn't been properly reviewed is like hiding your key under a very unremarkable rock; you HOPE it won't be found so your lock won't be tested.
It's called 'security through obscurity,' and it is extremely BAD security. Man has it been scrutinized! Said by pmw2: Actually, before WEP ever rolled out the door, it was already known that there were weaknesses.
Perhaps the committee members were in a hurry and considered Wi-Fi installations as low value targets, that wouldn't attract serious cracking attempts. So, they rushed it out.
Making crypto experts pay several hundred dollars each, for the right to examine WEP, wasn't exactly conducive to generating a great deal of scrutiny. On the other hand, perhaps they were trying for 'security by obscurity'.Sorry I have been 'out' for a while. Many demands on my time including speaking at the RSA Security conference. WEP was designed in '94 while ITAR ruled. Vendors wanted something exportable and to quote the NSA person who knew what was happening with WEP: 'We are very happy with the WEP design.'
The one crypto person that was on the 802 exec committee voted NO on it, but his ballot was rejected by the 802.11 chair. Of course this one person had earlier walked away from the.11 security work, feeling that with 802.10,.11 had everything it needed for security. You really have to see things in historical perspective. Particularly with good old ITAR. Now WPA consists of three security components: Authentication Key Establishment Datagram protection Taking the last first, TKIP MAY fall at some point.
Maybe in a year, more likely in 3-5 years. CCM is solid unless AES falls. For Authentication, a good EAP method and good backend security yields safe Master Keys. If you use PSK instead of an EAP method, then as earlier noted, you need a good key because. For Key Establishment, we are doing a welll designed challenge/response.
It is open to a dictionary attack as described in my paper. But each key attempt has to be hashed 4096 times, so even the dictionary attack is slow. Code for the attack can be found at tinypeap.com.
How strong is WPA? As we can see above, the answer is basically a question about how the Master Key was created.
THIS TUTORIAL IS ONLY FOR VALIDATING SECURITY OF YOUR ROUTER & PROTECT YOUR WIRELESS NETWORK FROM HACKERS DO NOT USE IT FOR HACK OTHERS WIRELESS NETWORK & PLEASE TRY IT WITH YOUR OWN ROUTER, IDENTIFY THE SECURITY HOLES & PATCH IT PLEASE TRY TO UNDERSTAND THE TECHNOLOGY & IMPROVE YOUR KNOWLEDGE, DON’T MISUSE IT. IT IS ILLEGAL ACTIVITY SO I AM NOT RESPONSIBLE FOR ANYTHING, I JUST SHARE KNOWLEDGE ONLY. KNOWLEDGE IS POWER, BUT POWER DOES NOT MEAN YOU SHOULD BE A JERK, OR DO ANYTHING ILLEGAL. KNOWING HOW TO PICK A LOCK DOES NOT MAKE YOU A THIEF. CONSIDER THIS POST EDUCATIONAL, OR A PROOF OF CONCEPT INTELLECTUAL EXERCISE Your Wi-Fi network is your conveniently wireless gateway to the internet, and since you’re not keen on sharing your connection with any old hooligan who happens to be walking past your home, you secure your network with a password, right? Knowing, as you might, how easy it is to crack a WEP password, you probably secure your network using the more bulletproof WPA security protocol. Here’s the bad news: A new, free, open-source tool called exploits a security hole in wireless routers and can crack most routers’ current passwords with relative ease.
Here’s how to crack a WPA or WPA2 password, step by step, with Reaver—and how to protect your network against Reaver attacks. In the first section of this post, I’ll walk through the steps required to crack a WPA password using Reaver. You can follow along with either the video or the text below. After that, I’ll explain how Reaver works, and what you can do to protect your network against Reaver attacks.
What You’ll Need You don’t have to be a networking wizard to use Reaver, the command-line tool that does the heavy lifting, and if you’ve got a blank DVD, a computer with compatible Wi-Fi, and a few hours on your hands, you’ve got basically all you’ll need. There are a number of ways you could set up Reaver, but here are the specific requirements for this guide: •. BackTrack is a bootable Linux distribution that’s filled to the brim with network testing tools, and while it’s not strictly required to use Reaver, it’s the easiest approach for most users.
Download the Live DVD and burn it to a DVD. You can alternately download a virtual machine image if you’re using VMware, but if you don’t know what VMware is, just stick with the Live DVD. As of this writing, that means you should select BackTrack 5 R3 from the Release drop-down, select Gnome, 32- or 64-bit depending on your CPU (if you don’t know which you have, 32 is a safe bet), ISO for image, and then download the ISO. If backtrack is not available download • A computer with Wi-Fi and a DVD drive. BackTrack will work with the wireless card on most laptops, so chances are your laptop will work fine. However, BackTrack doesn’t have a full compatibility list, so no guarantees. You’ll also need a DVD drive, since that’s how you’ll boot into BackTrack.