3GPP Subscription Identifier De-Concealing Function (SIDF) in Hardware

Engineering high-throughput ECIES decryption engines for 5G Standalone subscriber identity privacy.

The Evolution from Cleartext IMSI to Encrypted SUCI

For decades, cellular networks transmitted the International Mobile Subscriber Identity (IMSI) unencrypted over the air during initial network attachment, enabling rogue 'Stingray' surveillance devices. 5G Standalone encrypts the subscriber identity on the SIM card using the operator's public key (SUCI). TelecomHSM houses the corresponding private key in certified hardware, executing the SIDF function at carrier scale.

High-Volume ECIES Decryption Pipelines

During peak hours, national mobile operators process over 100,000 network attachment requests per second. TelecomHSM deploys parallelized Elliptic Curve Integrated Encryption Scheme (ECIES) decryption units that extract SUPIs in under 8 milliseconds.

Eliminating IMSI Catchers: Decrypting ephemeral SUCI payloads to reveal permanent subscriber identities (SUPI).
ECIES Profile A & B: Native hardware execution of Curve25519 (Profile A) and secp256r1 (Profile B).
Home Network Private Key (HN-PK) Vault: Securing operator master private keys against extraction.
Sub-10ms Handshake Latency: Ensuring initial 5G radio attachment completes without perceptible delay.

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