Welcome to Cythera, a Bastion Security Group Company (Formerly Phronesis Security)

Phronesis Security is now part of Bastion Security Group, bringing together decades of cybersecurity expertise under one trusted brand for Australian organisations and government.

The specialist cybersecurity services you relied on, including virtual CISO (vCISO) and security strategy, governance, risk and compliance (GRC), Infosec Registered Assessors Program (IRAP) assessments, penetration testing and red teaming, security architecture, and security awareness and education, continue to be delivered by the same experienced practitioners, now backed by the broader capabilities and resources of Cythera, a Bastion Security Group company.

This merger strengthens our ability to protect Australia against evolving threats, offering a more comprehensive and integrated security portfolio without compromising the specialist-led approach Phronesis Security was known for. Whether you're an existing Phronesis Security client or exploring what these services can do for your business, you'll find the same commitment to quality and rigour, now with greater depth behind it.
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End to End Cyber Resilience

Security services that leave no gaps

Dive deeper into our advanced offerings, from cloud security and penetration testing to GRC strategy and threat intelligence. Each solution is tailored to your risk, scale and industry.
Assess & Improve
Unsure about your security strength? Our Assess & Improve service identifies gaps, reveals your current stance, and guides your next smart step to stronger protection.
Detect & Respond
Spot threats early and act fast. Our detect and response services help you catch attacks in real time, respond confidently, and keep business running smoothly.
Protect & Secure
In a world of constant digital risk, we help you build smart defences, find vulnerabilities, and protect every layer of your infrastructure.
Advise & Empower
Build confidence in your cyber security programs. Our Advise & Empower services help shape strategy, manage risk, and lift your cyber maturity, so you can move forward with clarity.
Advise & Empower
Smarter security through expert guidance and training
Protect & Secure
Secure at every layer. One step ahead.
Detect & Respond
Fast to detect. Swift to respond.
Assess & Improve
Assess and strengthen your cyber defences