5G • Security
128-NIA1
SNOW 3G Integrity Protection Algorithm
Integrity algorithm generating 32-bit Message Authentication Codes based on SNOW 3G keystream.
Technical Explanation
128-NIA1 processes message payloads through the SNOW 3G keystream generator to compute a 32-bit Message Authentication Code (MAC-I). If any bit of the signaling message is modified over the radio channel, the receiver detects checksum failure and discards the packet.
Key Functions
- Computes 32-bit Message Authentication Code (MAC-I) via SNOW 3G
- Guarantees authenticity of RRC and NAS control messages
- Protects cellular signaling from man-in-the-middle bit tampering
Specifications
3GPP TS 33.501
Interfaces
UuN1
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