eapol wpa2
WPA 是WEP 到WPA2 的過度產品，它允許韌體或軟體在既有的WEP 硬體下，透過升級或者修改，直接支援到WPA。 .... 對WPA2-Personal 最有效的攻擊方式是抓取到一開始的EAPoL 封包，關鍵的是前面的幾個封包，我們稱其為4-Way Handshake 封包，就是一開始STA 與AP 之間的Nounce 交換過程，透過開源碼 ..., KRACK的漏洞中有三個跟EAPOL 4-way handshake有關，分別是CVE-2017-13077、CVE-2017-13078及CVE-2017-13079，EAPOL 4-way handshake的過程發生在802.1x的認證後或者使用PSK的AP及STA之間，或者說只要是802.1x或者是使用WPA2 PSK的環境無一倖免，EAPOL 4-way handshake的過程主要 ..., 然后也有类似的WPA2的CCMP认证过程。认证过程主要区别是EAPOL的第三个帧是加密的，而且使用的是SHA1的hash签名，而TKIP是MD5的hash签名。为什么CCMP更安全，不止是认证过程，还有数据传输过程，我还没有搞清楚。先不管，只管认证过程。WireShark数据截图：具体代码和数据包见github., The 802.11i "4 way handshake" that you have captured is where both parties agree on shared Group (read: broadcast) and Pairwise (read: unicast) transient keys. I.e. the keys generated here only exist for the duration of the 802.11 Association, , 上述的packet都是EAPOL-key frame。若檢查碼錯誤，則宣告handshake失敗。 PTK被分解如下，這些key是AP與STA之間用的，並且不會expose: 1. 128 bits的EAPOL-Key Confirmation Key (KCK)，用來計算WPA EAPOL key message的MIC. 2. 128 bits的EAPOL-Key Encryption Key (KEK)，用來加密額外要送 ...,IEEE 802.11i-2004, or 802.11i for short, is an amendment to the original IEEE 802.11, implemented as Wi-Fi Protected Access II (WPA2). The draft standard was ratified on 24 June 2004. This standard specifies security mechanisms for wireless networks, repl, 4-way handshake is parsed to get SP and STA addresses, AP and STA nonces, and EAPOL payload and MIC from 4th frame;; Candidate password is used to compute PMK;; PTK is computed from PMK, AP and STA addresses and nonces;; KCK from computed PTK is used to , The hash is not passed directly in the string of bits. It will not just be there to grab in one packet. In order to attack WPA/WPA2 you must capture the entire four-way handshake. The key itself is not really sent as part of the message, since both sides, WPA-4HANDSHAKE是基于802.1X 协议，使用eapol key进行封装传输。 AP初始化：. 使用 SSID 和passphares作为入参，通过哈希算法产生PSK。在WPA-PSK 中PMK=PSK。 l 第一次握手：. AP广播SSID，AP_MAC；. STATION 端使用接受到的SSID，AP_MAC和passphares使用同样算法产生PSK。 l 第二次握手.,Full details of the vulnerability: http://blog.mojonetworks.com/wpa2-vulnerability.
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 eapol wpa2 相關參考資料
Security Alley: 二樓守衛- WPAWPA2
WPA 是WEP 到WPA2 的過度產品，它允許韌體或軟體在既有的WEP 硬體下，透過升級或者修改，直接支援到WPA。 .... 對WPA2-Personal 最有效的攻擊方式是抓取到一開始的EAPoL 封包，關鍵的是前面的幾個封包，我們稱其為4-Way Handshake 封包，就是一開始STA 與AP 之間的Nounce 交換過程，透過開源碼 ... http://securityalley.blogspot. KRACK系列之二– EAPOL 4-way handshake – 閒聊Wi-Fi
KRACK的漏洞中有三個跟EAPOL 4-way handshake有關，分別是CVE-2017-13077、CVE-2017-13078及CVE-2017-13079，EAPOL 4-way handshake的過程發生在802.1x的認證後或者使用PSK的AP及STA之間，或者說只要是802.1x或者是使用WPA2 PSK的環境無一倖免，EAPOL 4-way handshake的過程主要&... http://www.purewifi.tw WPAWPA2-PSK认证过程– Slinuxer
然后也有类似的WPA2的CCMP认证过程。认证过程主要区别是EAPOL的第三个帧是加密的，而且使用的是SHA1的hash签名，而TKIP是MD5的hash签名。为什么CCMP更安全，不止是认证过程，还有数据传输过程，我还没有搞清楚。先不管，只管认证过程。WireShark数据截图：具体代码和数据包见github. https://blog.slinuxer.com security - WPA2 - EAPOL password exchange - Stack Overflow
The 802.11i "4 way handshake" that you have captured is where both parties agree on shared Group (read: broadcast) and Pairwise (read: unicast) transient keys. I.e. the keys generated here ... https://stackoverflow.com 4-way handshake @ 心的距離:: 痞客邦::
上述的packet都是EAPOL-key frame。若檢查碼錯誤，則宣告handshake失敗。 PTK被分解如下，這些key是AP與STA之間用的，並且不會expose: 1. 128 bits的EAPOL-Key Confirmation Key (KCK)，用來計算WPA EAPOL key message的MIC. 2. 128 bits的EAPOL-Key Encryption Ke... http://kezeodsnx.pixnet.net IEEE 802.11i-2004 - Wikipedia
IEEE 802.11i-2004, or 802.11i for short, is an amendment to the original IEEE 802.11, implemented as Wi-Fi Protected Access II (WPA2). The draft standard was ratified on 24 June 2004. This standard sp... https://en.wikipedia.org wpa2 - How exactly does 4-way handshake cracking work ...
4-way handshake is parsed to get SP and STA addresses, AP and STA nonces, and EAPOL payload and MIC from 4th frame;; Candidate password is used to compute PMK;; PTK is computed from PMK, AP and STA a... https://security.stackexchange wifi - Which part of the eapol packets contain WPA password Hash ...
The hash is not passed directly in the string of bits. It will not just be there to grab in one packet. In order to attack WPA/WPA2 you must capture the entire four-way handshake. The key itself is n... https://security.stackexchange WEP,WPA-PSK,WPA2-PSK握手深入分析1 - CSDN博客
WPA-4HANDSHAKE是基于802.1X 协议，使用eapol key进行封装传输。 AP初始化：. 使用 SSID 和passphares作为入参，通过哈希算法产生PSK。在WPA-PSK 中PMK=PSK。 l 第一次握手：. AP广播SSID，AP_MAC；. STATION 端使用接受到的SSID，AP_MAC和passphares使用同样算法产生PSK。 l 第二次握手. https://blog.csdn.net Vulnerabilities in EAPOL 4-Way Handshake | Part 2 | WPA2 Key ...
Full details of the vulnerability: http://blog.mojonetworks.com/wpa2-vulnerability. https://www.youtube.com |