Wpa how does it work

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It is similar to the WEP protocol, but offers improvements in the way it handles security keys and the way users are authorized. This prevents intruders from creating their own encryption key to match the one used by the secure network. Instead of authorizing computers based soley on their MAC address , WPA can use several other methods to verify each computer's identity.

This makes it more difficult for unauthorized systems to gain access to the wireless network. If you would like to reference this page or cite this definition, you can use the green citation links above. The goal of TechTerms. Different tools are available to crack the handshake. It is possible to do that with aircrack-ng, Pyrit project or hashcat. We used hashcat [9] a tool to recover many different types of hashes because it is very well documented, very powerful, supports a lot of different hardware and uses multi-threads.

Hashcat works only with. To convert pcap file to hccapx file we can use an online converter or hashcat-utils locally. Another way the crack a 4-way handshake is a dictionary attack.

The idea is to try the passwords the most used in the world. The following command performs a dictionary attack:. It is also possible to use a dictionary file in combination with a rules file. For example, classical rules are to replace the E by a 3 or A by a 4.

But because of the high computational cost of the hashes, it is not feasible for password longer than 12 or 15 characters. A few years ago, the Proximus Internet box B-Box used 8 capital-letters length passwords.

With the current classical hardware, it takes around 20 days to complete a brute-force attack. A brute-force attack would take several years and the interest of founding the password would be null. To illustrate the necessary time to crack a WPA password, we performed a performance analysis. We ran hashcat on three kinds of hardware and we tried to crack different types of password with brute-force and dictionary attacks.

We note also that for password with more than 12 characters, brute-force attacks are not very interesting even with very good hardware. A dictionary attack is, of course, faster but the attack could be failed if the password is a random one. Combining a dictionary attack with a rules file increase the probability to find the password.

This rules file was tested, with rockyou. It could be interesting to estimate the price of this attack. It is expensive for a single person but it is cheap for an organization, government, company, Practically, it is not always possible to recover the password in a reasonable time Maybe in a few years, the hardware will be able to crack a 50 characters password in few hours To protect your network, use a random password with, at least, 12 or even 15 characters.

It is also a good idea to change the password sometimes to render inefficient an off-line attack. Academic courses Trainings Project proposals. Running and Imaging with FTK Imager from a flash device In the process of analyzing a suspicious machine, the first thing we need to do is to actually image the machine we want to investigate.

The FTK Imager tool is easy to use and more importantly, there is a free version. Oct 21, views. However, a MAC address is not an authentication mechanism!