DOCSIS (Data Over Cable Service Interface Specification)

Data Over Cable Service Interface Specification (DOCSIS) is the CableLabs standard for delivering broadband internet over hybrid fibre-coaxial cable networks. Successive versions (1.1, 2.0, 3.0, 3.1, 4.0) have raised speeds into the multi-gigabit range. DOCSIS includes BPI/BPI+ for link encryption and uses certificate-based modem authentication to deter cloning and theft of service.

Categories: Radio Access NetworkSecurity ControlsProtocols and Standards

DOCSIS in context

The radio access network is the layer where mobile devices attach to the operator's infrastructure. Attacks in this layer include IMSI catching, rogue base stations, downgrade attacks and jamming, and defenses hinge on mutual authentication, integrity-protected signaling and Open RAN supply-chain hygiene.

Security controls in telecom span signaling firewalls (SS7/Diameter/GTP screening at the network edge), transport encryption (IPsec, TLS, PRINS), identity and access on OSS/BSS, and monitoring at both the packet and log level. Controls are audited against GSMA FS.11/FS.19/FS.20/FS.36 and, in Europe, NIS2 sectoral rules.

To place DOCSIS in the wider telecom-security picture, review SSH, 3G, ADSL, EAP, MPLS and SRv6.

Related terms

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