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What is GTK key?
GTK (Group Temporal Key): Group temporal key is used to encrypt all broadcast and multicast traffic between an access point and multiple client devices. GTK is the key which is shared between all client devices associated with 1 access point.
What is a WPA-PSK key?
Wi-Fi Protected Access Pre-Shared Key or WPA-PSK is a system of encryption used to authenticate users on wireless local area networks. It’s typically utilized by telecom companies for end user access in home local area networks. WPA-PSK may also be called WPA2-PSK or WPA Personal.
What does PSK mean for WiFi?
Pre-Shared Key
Pre-Shared Key (PSK) is a client authentication method that uses a string of 64 hexadecimal digits, or as a passphrase of 8 to 63 printable ASCII characters, to generate unique encryption keys for each wireless client.
How PTK is derived?
From the PMK, the station and AP derive three keys using a pseudorandom function. The pseudorandom function first generates an intermediate key, the PTK. The pseudorandom function in the pairwise key hierarchy (see Figure 8-15) is the industry-standard SHA-1 cryptographic hash.
What is the difference between WPA and WPA2-PSK?
WPA2 is the latest industry-standard method of protecting your wireless network. What is WPA2 – PSK ? WPA stands for “Wi-Fi Protected Access”, and PSK is short for “Pre-Shared Key.” There are two versions of WPA: WPA and WPA2.
Which is the GTK key used for TKIP?
GTK is divided into temporary keys: GEK (Group Encryption Key): Key used for data encryption (used by CCMP for auth and by TKIP for encryption). GIK (Group Integrity Key): Key used for data auth (used only by Michael for TKIP). Amazing pdf manual about this: Wi-Fi security – WEP, WPA and WPA2
How does WPA2 work in a home network?
From my understanding this is how WPA2 works for home networks: PSK (Pre-Shared Key) is used to generate PMK (Pairwise Master Key), which is used together with ANonce (AP Nonce) to create PTK (Pairwise Transient Key).
How does the 4 way handshake in WPA work?
TEK is used for encrypting traffic between client and AP, later during session. Now the WPA 4-way handshake: AP sends ANonse (AP Nonce) to client, which is basically a random Integer of 256 bits. Client use the ANonce and PMK to generate PTK (Pairwise Transient Key), and send CNonce (Client Nonce) and MAC.