What is the difference between open system authentication and shared key authentication?
The authentication process is similar to Open System authentication but includes a challenge and response between the AP and client station. Shared Key authentication is a four-way authentication frame exchange: The client station sends an authentication request to the AP.
What is open system authentication?
Open System Authentication (OSA) is a process by which a computer can gain access to a wireless network that uses the Wired Equivalent Privacy (WEP) protocol. With OSA, a computer equipped with a wireless modem can access any WEP network and receive files that are not encrypted.
How does shared key authentication work?
In shared key authentication, the access point sends a challenge text message to the computer attempting to connect. The connecting computer then encrypts the text with the WEP key and returns the encrypted text to the access point.
What are the benefits of open system authentication?
The open authentication method has no security whatsoever. If an STA can find and communicate with an AP, it will be allowed access. The advantage is the simplicity and ease, precisely because no setup is required.
How does TKIP encryption work?
TKIP ensures that every data packet is sent with a unique encryption key(Interim Key/Temporal Key + Packet Sequence Counter). Key mixing increases the complexity of decoding the keys by giving an attacker substantially less data that has been encrypted using any one key.
Which form of authentication is more secure and why open system authentication or shared key authentication?
After the authentication and association, the pre-shared WEP key is also used for encrypting the data frames using RC4. At first glance, it might seem as though Shared Key authentication is more secure than Open System authentication since the latter offers no real authentication. However, it is quite the reverse.
What’s the difference between WPA2 and WPA PSK?
WPA2-PSK is the strongest. WPA2-PSK gets higher speed because it is usually implemented through hardware, while WPA-PSK is usually implemented through software. WPA2-PSK uses a passphrase to authenticate and generate the initial data encryption keys. Then it dynamically varies the encryption key.
What are four shared key authentication techniques available?
Authentication using Shared Keys The most common among the algorithms are Diffie–Hellman key exchange, authentication using Key distribution center, kerberos and Needham–Schroeder protocol. Other methods that can be used include Password-authenticated key agreement protocols etc.
Why is shared key authentication considered a security risk?
Shared key authentication can easily be exploited through a passive attack by eavesdropping on both the challenge and the response between the access point and the authenticating client. Such an attack is possible because the attacker can capture both the plaintext (the challenge) and the ciphertext (the response).
Why is open authentication an unsecure solution?
Why is open authentication an unsecure solution? Because MAC addresses are easily spoofed. Which two additional components are required to implement 802.1x authentication? 802.1x authentication uses usernames and passwords, certificates, or devices such as smart cards to authenticate wireless clients.
