Hardware Generation of 5G AKA & EPS-AKA Authentication Vectors

Executing cryptographic challenge-response algorithms for mobile network subscriber authentication.

The Core of Cellular Authentication (5G AKA)

When a device connects to a 5G network, the Unified Data Management (UDM) invokes TelecomHSM to execute the MILENAGE or TUAK algorithm. The HSM takes a random challenge (RAND) and the subscriber's secret key (K) to generate the expected response (XRES*), cipher key (CK), integrity key (IK), and network authentication token (AUTN).

Preventing SQN Desynchronization Attacks

Adversaries attempt to desynchronize subscriber Sequence Numbers (SQN) to force resynchronization storms. TelecomHSM maintains secure hardware monotonic counter arrays that track SQN progression with automated delta-window validation.

MILENAGE Algorithm Suite: Hardware AES-128 implementation of 3GPP TS 35.206 functions (f1 through f5*).
TUAK Keccak/SHA-3 Suite: Modernized 3GPP cryptographic suite resistant to prospective AES cryptanalysis.
Monotonic Sequence Numbers (SQN): Hardware tracking of subscriber sequence numbers to prevent replay attacks.
Low-Latency Vector Caching: Pre-generating batches of authentication vectors for high-mobility cell handover.

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