Communications Security Services (COMSEC)

What is Communications Security (COMSEC)?

COMSEC is the practical discipline of communications data protection — keeping voice and data private, authentic and available to the right people. Communications security services go beyond encryption, using a layered approach that pairs end-to-end cryptography with sound key management, approved devices, strong identity controls, and clear handling procedures. Good COMSEC also considers how signals travel (over mobile, Wi-Fi, satellite or fixed lines), how equipment might leak information, and how access to systems and keys is physically controlled.

COMSEC is equally about communications threat mitigation. As a leading COMSEC solutions provider, NSI Global anticipates and counters the methods attackers use to intercept or manipulate traffic. That includes defending against rogue base stations (IMSI catchers), SS7/Diameter abuse, malicious Wi-Fi access points, line taps, compromised conferencing bridges, device malware and jamming, as well as human factors like phishing and unsafe apps.

The goal is simple: what you say or transmit cannot be read, altered or faked by an adversary, and there’s an auditable record of how it’s protected.

Government COMSEC Suite

You’re exposed to foreign intelligence services, issue-motivated groups and insider risk. Our government communications security package allows you to regain sovereignty over your airspace, counter baseband/signalling threats, and mobilise secure voice and text communications at scale.

• Available to government only.
• NSI Network Defender | IMSI Catcher Detection and Neutralisation:
  a unique COMSEC network protection system for distributed detection, localisation, and neutralisation of malicious mobile base stations, generating a continuously updated national situation report on baseband attacks, cellular signalling manipulation and jamming.
• NSI Network Sentry | SS7 Intrusion Detection and Firewall System:
  used in conjunction with Network Defender for a complete network detection, blocking, and neutralising solution.
• BlackBerry SecuSUITE® for Government:
  end-to-end encrypted voice and text for unclassified and classified communications on iOS® and Android™, deployable on-premise or in a trusted offsite data centre, centrally managed/OTA enabled, approved for use by NATO’s NCI Agency.

Corporate COMSEC Suite

Wiretapping has become so widespread, simple, and uncontrolled that you must assume records of private calls and SMS can end up in the wrong hands; interception gear is now available at such low prices that it’s used even in small business or domestic conflicts. Our corporate communications security services are here to help.

• NSI Encrypted Communication Devices: provide an easy-to-use and trustworthy solution for confidential voice and messages.
• FIPS 140-2 Certified; NIST-approved algorithms with 4096-bit Diffie-Hellmann key exchange.
• AES-256 and Twofish for voice and data; well-researched algorithms for encryption and voice processing.
• Secure phone book container; full source code available for independent review — no backdoors.
• Strict due-diligence supply; available only to properly vetted corporate or government clientele.
• Applicable industries: Banking & Financial Services, Pharmaceuticals, Energy, Legal Professionals, Consulting & Accountancy, Mining, Aerospace.

Telecommunications Network Security

NSI Global’s Network Security Systems, as well as our SS7 vulnerability testing and consulting services, allow mobile network operators, telecommunications regulatory authorities, and public safety and security agencies to defend themselves against illegal interception, user tracking, manipulation, and fraud on the network level, covering the entire signal chain from edge to core.

• Sentry Detect: comprehensive intrusion detection that identifies protocol violations/misuse by fraudsters or unauthorised entities using high-performance real-time analysis and an auto-updating monitoring rule set—enabling operators to identify and report threats.
• Sentry Block: an active SS7 firewall that automatically blocks illegal traffic at each SS7 Signal Transfer Point, preventing it from penetrating the core network.
• SS7 & Diameter Vulnerability Testing & Consulting: industry-leading signalling network assessments to protect the core network’s “Achilles heel” from privacy violations, interception, data theft, billing fraud, denial of service and settings manipulation; aligned to GSMA FS.11 Category 1–4 and valid for 2G/3G/4G/5G.
• Proven at scale: deployed with Tier-1 operators in Europe and North America, and widely used across Africa, the Middle East and Asia—a track record among the industry’s most impressive in SS7 testing and consulting.
• Applicable stakeholders: Mobile Network Operators (MNOs), MVNOs, telecom regulators, and public safety/security agencies.

COMSEC Readiness & Hardening Audit

A concise assessment and uplift to close gaps in communications data protection and communications threat mitigation across people, process and tech.

• Audit of devices, encrypted apps, conferencing, and network/signalling exposure
• Key management and access controls (generation, storage, rotation, revocation)
• Practical handling policies and traveller kits; secure-meeting protocols
• Incident playbooks for suspected interception, lost devices or key compromise

Why Choose NSI Global for COMSEC?

NSI Global is a proven COMSEC solutions provider delivering end-to-end communications security services for government and enterprise. For more than two decades we’ve secured mission-critical voice and data with a layered stack. Working alongside our Technical Surveillance Counter-Measures team, we close gaps between in-room capture and network/signalling attacks — providing a dual-layer defence that protects conversations across room, device, app and carrier layers. The result is practical, auditable government communications security and corporate communications security that withstands real-world threats.

We deliver and support COMSEC across Australia, the UAE, the Middle East, and APAC. From our radio-shielded offices, we run confidential consultations and secure deployments — on-prem or in trusted hosting — integrating cleanly with your policies, carriers and global operations.