WPA (Wi-Fi Protected Access)

A family of Wi-Fi security protocols developed by the Wi-Fi Alliance to replace the broken WEP standard. WPA introduced TKIP and per-packet keys; WPA2 adopted AES-CCMP and is the long-time enterprise baseline; WPA3 added Simultaneous Authentication of Equals (SAE) to defeat offline dictionary attacks and forward secrecy for personal mode. Original WPA and WPA2-Personal with weak passphrases remain vulnerable to KRACK and offline cracking, so WPA3 is recommended wherever supported.

Categories: Core NetworkIdentity and SubscriberSecurity Controls

WPA in context

The mobile core carries subscriber sessions, mobility and policy. In 4G it is the EPC (MME, HSS, S/PGW); in 5G it is the Service-Based Architecture with AMF, SMF, UPF, AUSF, UDM and the NRF.

Subscriber identifiers (IMSI, SUPI, MSISDN, IMEI) anchor authentication, charging and lawful interception. Any protocol that leaks a permanent identifier is treated as a privacy defect, which is why 5G introduced SUCI concealment on the air interface.

To place WPA in the wider telecom-security picture, review WPA3, UDM, NIST, OTA, OTP Bypass Attacks and WCDMA: each entry cross-references back to this page so you can walk the topic in either direction.

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