WAPI is a wireless transmission protocol like infrared, Bluetooth, GPRS, CDMA 1X, but different from them, it is a transmission protocol in WLAN and the same technology as the 802. 1 1 transmission protocol.
WAPI is a security mechanism in the mandatory standard of China WLAN.
Different from WIFI one-way encryption authentication, WAPI two-way authentication ensures the security of transmission. WAPI security system adopts public key cryptography technology, authentication server AS is responsible for issuing, verifying and revoking certificates, and both wireless clients and wireless access points AP are equipped with public key certificates issued by AS as their own digital identity certificates.
When the wireless client logs in to the wireless access point AP, both parties must pass the authentication of the authentication server before accessing the network. According to the verification result, the mobile terminal with the legal certificate can access the wireless access point AP using the legal certificate.
WPI encrypts and decrypts MPDU in MAC sublayer, which is used for digital certificate, key agreement and encryption and decryption of transmission data of WLAN devices respectively, thus realizing device identity authentication, link verification, access control and encryption protection of user information in wireless transmission state.
WAPI wireless LAN authentication infrastructure (WAI) not only has more secure authentication mechanism and more flexible key management technology, but also realizes centralized user management of the whole basic network. So as to meet more users and more complex security requirements.
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1, for security reasons.
In 20 13, Snowden exposed the prism gate incident in the United States, which sounded the alarm for network and information security in various countries. Countries began to re-examine the security of WIFI and the real intention of the United States to block WAPI, which also became an opportunity for the rebirth of WAPI.
For individual users, the biggest advantage of WAPI is to make their laptops safer from now on.
2. For the benefit.
China is a developing country with booming economy, and many products have huge development space, especially high-tech products. However, in the past, China lost many opportunities in high-tech products. Because there are few products with independent core technologies and their own industry standards, it has caused a rather passive situation: DVD will be charged a lot of patent fees by foreigners, and standards such as GPRS, CDMA 1X are in the hands of foreigners.
We can only give a large sum of money to others to buy their standards, and we are like a "part-time" worker who can only do OEM work and help people assemble products. So some people say that "first-class enterprises sell standards, second-rate enterprises sell technology, and third-rate enterprises sell products".
Baidu encyclopedia -WAPI