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Sequence diagram for a Wi‑Fi deauthentication attack. Unlike most radio jammers, deauthentication acts in a unique way. The IEEE 802.11 (Wi-Fi) protocol contains the provision for a deauthentication frame. Sending the frame from the access point to a station is called a "sanctioned technique to inform a rogue station that they have been ...
They noted that denial of service deauthentication attacks are possible because the messages are unauthenticated and unencrypted (later implemented by the aireplay-ng tool). [30] In addition, they wrote that because some implementations of WEP derive the key from a password, dictionary attacks are easier than pure brute force. [31] [17]
A wireless intrusion detection system (WIDS) monitors the radio spectrum for the presence of unauthorized, rogue access points and the use of wireless attack tools. The system monitors the radio spectrum used by wireless LANs, and immediately alerts a systems administrator whenever a rogue access point is detected.
Wireless security is another aspect of computer security. Organizations may be particularly vulnerable to security breaches [6] caused by rogue access points.. If an employee adds a wireless interface to an unsecured port of a system, they may create a breach in network security that would allow access to confidential materials.
An evil twin is a fraudulent Wi-Fi access point that appears to be legitimate but is set up to eavesdrop on wireless communications. [1]This type of attack, also known as a man-in-the-middle attack, may be used to steal the passwords of unsuspecting users, either by monitoring their connections or by phishing, which involves setting up a fraudulent web site and luring people there.
TKIP employs a per-packet key, meaning that it dynamically generates a new 128-bit key for each packet and thus prevents the types of attacks that compromised WEP. [ 4 ] WPA also includes a Message Integrity Check , which is designed to prevent an attacker from altering and resending data packets.
If an attacker installs an access point they are able to run various types of vulnerability scanners, and rather than having to be physically inside the organization, can attack remotely—perhaps from a reception area, adjacent building, car park, or with a high gain antenna, even from several miles away. When a victim connects, the attacker ...
After enough packets have been collected, the program can then compute the key for the wireless network. As the software makes use of brute-force attack however, cracking the encryption can take between a few hours to several days, based on the activity on the network.