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 is where subscriber sessions, mobility and policy live. 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. Core exposure is the difference between a single-subscriber leak and a fleet-wide breach.

Subscriber identifiers (IMSI, SUPI, MSISDN, IMEI) are the anchor for authentication, charging, lawful interception and fraud analytics. Any protocol or interface that leaks a permanent identifier is treated as a serious 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, ePDG, NIST, OTA and OTP Bypass Attacks.

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