英国网络安全论文代写 欺骗STA重新安装
Keywords:英国网络安全论文代写 欺骗STA重新安装
密钥重新安装攻击是一种技术，攻击者欺骗STA重新安装以前使用的密钥以获得对网络的访问权。KRACK利用WPA和WPA2协议4路握手。4路握手首先确认AP和STA具有相同的网络预共享密钥(PSK)。AP和STA可以在不泄露PSK的情况下发送加密，只有在接收方拥有PSK的情况下才能解密。他们这样做的方式是美联社发送一个号码使用一次(Nonce)给STA。nonce用于密码通信，以防止重播攻击。AP还发送一个密钥重播计数器，其目的是使AP能够识别它从STAs接收到的消息与它发送出去的nonce匹配。STA将收到消息1来自美联社和使用相移键控可以创建自己的现时标志值这将随着关键重播计数器从消息1,美联社可以识别认证密钥和消息完整性代码(MIC)这是一个个人的代码检查消息的篡改。当STA做所有这些的时候，它也会创建一个成对的瞬态键(PTK)。PTK是一个密钥，它由来自AP的Authenticator Nonce (ANonce)、来自STA的Supplicant Nonce (SNonce)、PMK、AP媒体访问控制(MAC)地址、STA MAC地址生成。然后用于加密PTK之间的所有单播传输STA和AP AP.Once已收到消息2验证ANonce,麦克风和重放柜台如果这是验证发送STA一个麦克风和一组颞键(GTK)这是一个关键,可以使用如果美联社整个网络广播或多播在网络上的斯塔斯多。
英国网络安全论文代写 欺骗STA重新安装
A Key reinstallation attack is the technique where the attacker tricks the STA into reinstalling a previously used key to gain access to the network. KRACK exploits both WPA and WPA2 protocols 4- way handshake. The 4-way handshake starts by confirming the AP and the STA have the same pre-shared key (PSK) for the network. The AP and STA can do this without ever disclosing the PSK by sending an encryption that can only be decrypted if the recipient has the PSK. The way they do this is the AP send a number used once (Nonce) to the STA. A nonce is used in cryptographic communications to prevent replay attacks. The AP also send a key replay counter, the purpose of this is so that the AP can identify messages its receives from STAs match the nonce it has sent out. The STA will receive message 1 from the AP and using the PSK can create its own nonce value this will be sent along with the key replay counter from message 1 so that the AP can identify the authentication key and a message integrity code (MIC) this is a personal code that checks for tampering of the message. While the STA is doing all that it will also create a Pairwise Transient Key (PTK). PTK is a key that is generated from the Authenticator Nonce (ANonce) from the AP, Supplicant Nonce (SNonce) from the STA, PMK, AP media access control (MAC) address, STA MAC address. The PTK is then used to encrypt all unicast transmissions between the STA and the AP.Once the AP has received message 2 it verifies the ANonce, MIC and Replay counter if this is authenticated then sends the STA a MIC and a Group Temporal Key (GTK) this is a key that can be used if the AP broadcasts to the whole network or multicasts to more than on STAs on the network.
