Cyber Security for Government in Australia

Cyber security for government in Australia operates under some of the most demanding expectations in the country. Federal, state and local agencies hold vast amounts of citizen data and run the services communities rely on every day. Their suppliers inherit much of that responsibility. When a government system is compromised, the fallout can include exposed personal information at scale, disrupted essential services and a lasting hit to public trust.

This briefing looks at the threats facing Australian government in 2026, the frameworks that shape agency security programs, and how offensive testing builds the assurance that policy and compliance alone cannot provide.

Why Government Is a High-Value Target

Government sits at the centre of national life. Agencies manage welfare and health payments, tax and identity records, transport and utilities, law enforcement and emergency response. That concentration of sensitive data and critical services makes government an attractive target for a wide range of adversaries.

The threat is also unusually capable. Alongside criminal groups seeking data and financial gain, government systems attract state-linked actors with significant resources and patience. These adversaries pursue espionage, disruption and long-term access, and they are willing to invest in sophisticated attacks. The consequences of success can include:

• Exposure of citizen data on a large scale, with serious privacy harm.
• Disruption to essential public services and critical infrastructure.
• Espionage against policy, defence and economic interests.
• Erosion of public confidence in government institutions.

The Threats Agencies Face

While the adversaries may be advanced, the attack paths often start in familiar places. The threats that most commonly cause harm across government include:

• Phishing and credential theft targeting staff and contractors.
• Exploitation of internet-facing applications and unpatched systems.
• Ransomware that disrupts services and increasingly involves data theft.
• Supply chain and third-party compromise, reaching agencies through their vendors.
• Weak identity and access controls that allow attackers to move once inside.

A recurring theme is the gap between having a control and having a control that works. An agency may have documented policies, patching schedules and access rules, yet still be exposed if those controls are not implemented consistently across a large and complex estate. Testing is how that gap gets found before an attacker exploits it.

The Information Security Manual and PSPF

Two frameworks anchor government security in Australia. The Information Security Manual, produced by the Australian Signals Directorate, provides a risk-based cyber security framework of controls spanning governance, physical, personnel and technical domains. The Protective Security Policy Framework sets out how government entities protect their people, information and assets across security governance, information, personnel and physical security.

The two work together. The PSPF sets the policy expectations, and the ISM supplies the detailed technical controls that help meet them. Agencies design, operate and assure their security within this structure, and the requirements flow down to the suppliers that handle government information. Security testing is most useful when it is scoped to validate the controls these frameworks call for, showing not just that a control exists but that it holds up against a capable attacker.

The Essential Eight

The Essential Eight is the practical core of many government security programs. It is a set of prioritised mitigation strategies from the Australian Signals Directorate, measured across maturity levels so agencies can target a level appropriate to their risk. The strategies cover application control, patching applications and operating systems, configuring Microsoft Office macro settings, user application hardening, restricting administrative privileges, multi-factor authentication and regular backups.

The Essential Eight is powerful because it focuses effort on the mitigations that stop the most common and damaging attacks. But maturity is easy to overstate on paper. An agency may believe it has reached a target level, only for testing to reveal that patching lags on certain systems, that administrative privileges are broader than intended, or that backups have never been tested for a real recovery. Validating Essential Eight maturity through hands-on penetration testing turns an assumed maturity level into evidence.

IRAP-Aligned Testing and Assurance

Government assurance often involves IRAP, the Infosec Registered Assessors Program, through which endorsed assessors evaluate systems against government requirements. IRAP-aligned testing means offensive security testing designed and scoped to support and complement that process, for example by validating that the technical controls the ISM requires are genuinely effective.

It is important to be clear here. StrikeCyber is not an IRAP assessor. Our role is to provide independent offensive security testing that gives agencies and their suppliers concrete technical evidence of control effectiveness, feeding into their broader assurance and accreditation activities rather than replacing them. That distinction matters, and reputable providers should always be transparent about it.

Suppliers Carry the Requirements Too

Government does not defend itself in isolation. Agencies rely on a wide ecosystem of technology vendors, service providers and integrators, and they remain accountable for their information even when a supplier handles it. As a result, contractual requirements aligned to the ISM, PSPF and Essential Eight are routinely passed down.

For suppliers, this has real commercial weight. Being able to demonstrate credible, well-scoped security testing has become a practical requirement for winning and keeping government work. A vendor that can show independent evidence of control effectiveness, tracked remediation and retesting is in a far stronger position than one relying on self-assessment alone.

How Offensive Testing Builds Real Assurance

Frameworks describe what good looks like. Offensive testing proves whether you have achieved it. Rather than confirming a control is present, testing puts it under realistic pressure to see whether an attacker would be stopped.

Different techniques answer different questions:

• Penetration testing gives focused technical assurance on applications, networks, cloud environments and Essential Eight implementation.
• Red teaming simulates a realistic adversary across people, process and technology, testing detection and response as well as prevention. A red team engagement is well suited to the advanced threats government faces.
• Pairing testing with rehearsed incident response planning ensures that if prevention fails, detection and recovery hold up under a real crisis.

Understanding where an agency or supplier stands today helps focus effort. A structured security maturity assessment can benchmark current controls and governance against the outcomes these frameworks require. StrikeCyber supports government and supplier engagements nationally, including penetration testing in Canberra and other capitals.

Turning Frameworks Into Confidence

Government security is not about generating documents. It is about protecting citizen data and essential services against capable adversaries. The agencies and suppliers that do this well use the ISM, PSPF and Essential Eight as a foundation, then prove their controls work through independent testing, close findings through retesting, and keep their response plans rehearsed.

If you need government-aligned security testing scoped around your real risks and obligations, our team of expert operators can help. Explore our penetration testing services, review our red teaming capability, or get in touch for a scoping conversation. You can also call StrikeCyber on 1300 654 898.