Check four WiFi encryption standards: WEP, WPA, WPA2 and WPA3

In wireless security , Wireless password is only the most basic encryption method , Choosing the appropriate encryption level is the most important , The right choice will determine the wireless LAN Is it a straw house or a tough fortress .

Wireless security protocols can not only prevent random people from connecting to wireless networks , It can also encrypt private data sent by radio waves .

Most wireless access points (AP) Can enable one of the following four wireless encryption standards ：

• WEP -WEP
• WPA2
• WPA3

Let's take a look at these four encryption standards in detail ！

Let's go straight to ！

WEP

• English full name ：Wired Equivalent Privacy
• Chinese name ： Wired Equivalent encryption
• Put forward the time ：1997
• The algorithm used ：RC4
• function ： Protect clients and access points (AP) Between the wireless data from hackers

WEP Although widely used , But it is too vulnerable to hackers , Network security experts have detected WEP Many vulnerabilities of , therefore ,Wi-Fi The league is 2004 It was officially retired in .

WPA

• English full name ：Wi-Fi Protected Access
• Chinese name ：Wi-Fi Access protection
• Put forward the time ：2003
• The algorithm used ：TKIP

because WEP A loophole in the , A new protocol must be developed ,WPA emerge as the times require ,TKIP Use 256 Bit key instead of WEP Medium 64 Bit and 128 A key .

WPA Including message integrity check and temporary key integrity protocol (TKIP).

WPA There are two different patterns ：

• Business model (WPA-EAP)
• Personal mode (WPA-PSK)

TKIP Use with WEP The same underlying mechanism , Therefore, it is vulnerable to many similar attacks （ for example Chop-Chop、MIC Key recovery attack ） The attack of .

WPA2

• English full name ：Wi-Fi Protected Access Version 2
• Chinese name ：Wi-Fi Access protection 2 generation
• Put forward the time ：2004
• The algorithm used ：AES-CCMP

WPA2 Is the first WPA Advanced version of .WPA The weak part of is WPA2 Become stronger in .

WPA2 Replaced with two more powerful encryption and authentication mechanisms RC4 and TKIP： Advanced encryption standard ( AES ) And using cipher blocks to link message authentication code protocols, respectively ( CCMP ) Counter mode .

WPA2 Very useful for home networking , But it is vulnerable to corporate networks , because , Attackers can access and use WPA2 Protected network , After accessing the network , They can access the password , Dictionary attack yes WPA2 The most vulnerable part of the password .

WPA3

• English full name ：Wi-Fi Protected Access Version 3
• Chinese name ：Wi-Fi Access protection 3 generation
• Put forward the time ：2018
• The algorithm used ：AES-GCMP

WPA2 There has been a 10 For many years , however WPA2 There are serious security vulnerabilities in the protocol , Affected almost all Wi-Fi equipment , Including computers 、 Smartphones and routers . An attacker can use this vulnerability to launch a KRACK, Read all outgoing Wi-Fi Connected traffic , For example, credit card number 、 Account password 、 Chat record 、 Photos, videos, etc . Although some of the traffic itself is encrypted , But there are still serious risks . in addition , The attacker does not need to know the user's Wifi password , Therefore, changing the password does not protect against attacks .

therefore WPA3 emerge as the times require ！！！

WPA3 yes newest Wireless security standard , It is also the safest standard now considered by experts , since 2020 year 7 Month begins ,Wi-Fi The alliance demands that all seek Wi-Fi All certified devices support WPA3.

WPA3 Provides a new Key exchange protocol , Use this Agreement , It will use a safe way , Equal handshake meanwhile Authentication , Before , Use WPA2 when , Four handshakes were used , It's very vulnerable .

WPA3 Use the following two WiFi One of the security modes ：

• WPA3 Personal mode ： Provide 128 Bit encryption , Use WPA-PSK/ Pre shared key .
• WPA3 Enterprise Edition ： Provide 192 Bit encryption , Use AAA/RADIUS Authentication server .

summary

WPA3 It's very safe for now , And has supported WIFI6, Just support WIFI6 Basically, all the devices support WPA3, In the near future , Wireless security protocols are WPA3 Of the world ！