Thanks to the proliferation of wireless networks all around us, the question of how to hack wifi passwords is one that lots of people now have to deal with.
And because there are numerous reasons for wanting to hack into a wifi signal, this ability tends to come in handy when you least expect.
Thankfully, we now have wifi hack tools available for use in homes, offices, or while on the go that can crack any password-protected network.
So whether you simply can’t remember your access details, or have to share other people’s network whilst remaining undetected, this guide on how to hack wifi is for you.
Wireless Network Authentication
Of course, you’ll need a device that is wireless network-enabled such as a PC, smartphone, or tablet.
You must also be within the range of the network transmission access point. If the wireless connection is not protected by a password, then you can connect easily. But if the access point is password-protected, you’ll have to input the correct password details to access it.
About Hacking Wireless Networks
Before providing you with DIY tips on how to hack wifi password info, you must first consider the type of wifi network you’re trying to crack.
Because there are different types of wireless networks, we also have different protection systems and different ways to hack them as well.
Generally, wireless networks make use of radio signals for connecting with PCs and other devices.
There are basically two different security system types available for wireless networks – the WEP (Wired Equivalent Privacy) which is the older version, and the WPA (Wifi Protected Access); currently the best on the market.
WEPs tend to be easier to hack because they make use of older technology.
WPAs on the other hand, are much better at keeping intruders out thanks to their more complex protection methods.
Next on our How to Hack Wifi Password Guide, we will examine features of both systems as well as existing security loopholes that can be exploited to gain access without permission.
WEP technology was developed for WLAN IEEE 802.11 standards. It was created essentially to provide a form of encrypted security system that is equivalent to what is offered on wired networks.
It operates by encrypting transmitted data thus preventing eavesdropping on the network.
There are two types of authentication processes on WEP networks. They are:
- OSA (Open System Authentication) – Lets you gain access to wireless networks based on the configured request authentication policy.
- SKA (Shared Key Authentication) – Lets you send encrypted requests to the network access point. The access point will then respond to the encrypted request with its key. Access will only be granted if the encrypted request corresponds to the access point key value.
WEP protection systems tend to have significant vulnerabilities and design flaws.
- The packet’s integrity is usually checked with CRC32 (the Cyclic Redundancy Check).
This particular integrity check can be hacked after capturing at least 2 data packets. Once the attacker can modify the checksum along with bits of the encrypted stream, the authentication system will automatically accept the packet sent.
This is what results in unauthorized network access.
- WEP systems create stream ciphers by utilizing the RC4 encryption algorithm.
This stream cipher input usually consists of a secret key and an Initial Value. The secret key’s length can be either 40 or 104 bits long while that of the initial value is 24 bits.
The total length for both the secret key and Initial Value can be either 64 or 128 bits. It is the least possible secret key value that makes for easy hacking.
- WEP protocol is password-based; hence it is vulnerable to dictionary hacks.
- Password combinations with weak initial values don’t always encrypt sufficiently hence they are susceptible to attacks.
- Poorly implemented keys management.
Because WEP doesn’t feature a centralized system for key management it can be very challenging to change your keys especially while using larger networks.
- The Initial Values are reusable.
All these security loopholes are responsible for the depreciation in WEP systems in favor of WPA based security.
The WPA (Wifi Protected Access) security protocol was explicitly developed to address WEP weaknesses.
It can be used for data encryption on 802.11 WLANs. And instead of the 24 bits Initial Values used on WEPs, WPAs make use of higher 48-bit values. Also, it encrypts packets by using temporal keys
- Weak passphrases are often defenseless against dictionary attacks.
- Vulnerability to service denial attacks.
- The implementation for collision avoidance can be broken.
How to Hack Wifi Networks
Hacking (or cracking) can best be described as the method used to exploit loopholes in wireless network security systems to gain unauthorized access.
WEP hacking/cracking refers to the process of exploiting WEP network protocols. There are essentially 2 different types of WEP hacks. They are:
- Passive cracking – This method is almost impossible to detect since there won’t be any changes in the network traffic until the WEP security protocol has been breached.
- Active cracking – With this type of WEP hack, the network traffic will experience an increased load which makes it easily detectible, unlike the passive cracking method. However, this approach is still more effective than the former.
WEP Cracking Tools
So you want to learn how to hack wifi networks?! Here are some handy tools you can use for the job:
- Aircrack – You can download this brilliant network sniffer & WEP cracking tool from http://www.aircrack-ng.org/
- Kismet – Once you enable this wifi cracker, you get to detect both visible and hidden wireless signals and access their sniffer packets undetected. Get it here: https://www.kismetwireless.net/
- WebDecrypt – This tool can crack WEP keys with active dictionary attacks. It even comes equipped with an in-built key generator along with implements packet filters. Download it here: http://wepdecrypt.sourceforge.net/
- WEPCrack – With this open-source hacking software, you get to use an FMS attack implementation to break into 802.11 WEP secret keys. Get it here: http://wepcrack.sourceforge.net/
Because short passphrases tend to be susceptible to password hacks like dictionary attacks, WPA systems also use 256 pre-shared keys for authentications.
So you want to learn how to crack wifi password info? Here are some proven WPA key cracking tools you can use for the job:
- Cain & Abel – Perhaps you’re looking to decode capture files obtained from other sniffing software like Wireshark; this is the ideal tool for the job.
Note that these capture files might come with WPA-PSK or WEP encoded frames.
- CowPatty – You get to use brute force attacks to crack PSK (pre-shared keys) with this handy hack tool. http://wirelessdefence.org/Contents/coWPAttyMain.htm
Hacking Activity: How to Crack Wifi Password
We have reached the section of our guide where we will describe practical wifi cracking steps.
Here, we show you how to decode stored wifi network password details on Windows by using Cain & Abel as well as provide useful tips for cracking WPA and WEP keys for wireless networks.
Here’s how to decode passwords for wifi networks that are stored on Windows systems.
- You can start by downloading Cain & Abel via the link we have provided above.
- Once the installation is complete, you can launch Cain & Abel.
- Next, you must select the tab for Decoders and then click proceed to click on the Wireless Passwords option on the left-sided navigation menu.
- Afterward, you can click on the plus (+) icon.
- If you had connected previously to a secure wifi network, you will then notice similar results to the ones displayed in the image below:
- You will then see the type of encryption, SSID, and password details that were used on the wireless network decoder.
Here ends our guide on how to hack wifi networks.
Each method we’ve identified above comes with a high success rate. Feel free to check back here for more useful software tips & hacks.