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

• WPA

• 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 ！