Contents
- 1 How 4-way handshake is used to establish pairwise transient key?
- 2 Why does TCP use 4 way handshake?
- 3 Why HTTP connection require 3 handshakes but disconnect requires 4?
- 4 Which is Pairwise Transient key in EAP-TLS handshake?
- 5 When to use temporal mic-2 GTK in CWSP?
- 6 How many keys can crunch in a WPA handshake?
How 4-way handshake is used to establish pairwise transient key?
A four-way handshake is used to establish another key called the Pairwise Transient Key (PTK). The PTK is generated by concatenating the following attributes: PMK, AP nonce (ANonce), STA nonce (SNonce), AP MAC address, and STA MAC address. The product is then put through a pseudo-random function.
Why does TCP use 4 way handshake?
In connection Termination : it takes four segments to terminate a connection since a FIN and an ACK are required in each direction. (3) means that sometime later the application that received the end-of-file will close its socket. This causes its TCP to send a FIN.
Why HTTP connection require 3 handshakes but disconnect requires 4?
Why 3-way handshake is required?
A three-way handshake is primarily used to create a TCP socket connection to reliably transmit data between devices. As soon as a client requests a communication session with the server, a three-way handshake process initiates TCP traffic by following three steps.
How is GTK used in a WPA handshake?
Client sends SNonce to AP and a MIC (Message Integrity Code) which includes the authentication. The AP creates PTK and sends the GTK (Group Temporal Key), along with a sequence number together and an MIC. The client sends a confirmation to the AP. GTK is then used to decrypt multicast/broadcast traffic.
Which is Pairwise Transient key in EAP-TLS handshake?
The EAP-TLS handshake aims to provide mutual authentication between supplicant and authentication server, and then derive the Pairwise Master Key (PMK). In the 4-way handshake the supplicant and the authenticator use PMK to derive a fresh pairwise transient key (PTK).
When to use temporal mic-2 GTK in CWSP?
Temporal MIC-2 GTK is used to encrypt all broadcast/multicast transmission between an AP & multiple client statsions. GTK is derived on Authenticator & sending to supplicant during 4-Way Handshake (M3) 4-Way handshake utilizing EAPOL-Key frames initiated by the Authenticator to do the following.
How many keys can crunch in a WPA handshake?
In this example, we know the password (“theonecp”), it has 8 lowercase chars (WPA Minimum), so that’s 26^8 = 208.827.064.576 possible combinations. On our machine, crunch + aircrack has performance of 10k keys/sec.