Catharsis

Catharsis Cyber Security is a Sydney cyber security company, certified to ISO/IEC 27001:2022. We help organisations protect, test and run their technology: managed security, penetration testing, security-first managed IT, secure AI and secure development.

 

18 stories by Catharsis

Private AI, ChatGPT or Copilot? A decision guide for Australia

ChatGPT, Microsoft 365 Copilot and private AI on your own hardware handle your data in very different ways. This...

Oct 18 · 10 min read >

What do cyber insurers ask, and how do you answer honestly?

Cyber insurance proposal forms ask short yes/no questions that carry a lot of weight. This guide explains what each...

Oct 17 · 10 min read >

ASD Essentials for Small Business: What Changed, What to Do First

ASD published ASD Essentials on 15 October 2026. It replaces maturity levels with priority phases, rates each security action...

Oct 16 · 22 min read >

Christmas Invoice Fraud: A Call-Back Checklist for Accounts Teams

Reported payment redirection losses in Australia reached $166.8 million in 2025, more than the year before, and the end-of-year...

Oct 13 · 8 min read >

MFA isn’t enough: how device-code phishing hijacks Microsoft 365

Device-code phishing gets staff to sign in on the real Microsoft page and approve an attacker's session, so passwords...

Oct 6 · 8 min read >

Automated decisions: what your privacy policy must say by 10 Dec

From 10 December 2026, organisations covered by the Privacy Act must explain in their privacy policy when a computer...

Oct 1 · 9 min read >

How do you spot a phishing email? Red flags and a free trainer

Most phishing emails give themselves away in four places: the sender, the request, the links and the pressure. Here...

Sep 17 · 14 min read >

Paid a ransom? Australia’s 72-hour reporting rule explained

If your business turns over more than $3 million, or runs critical infrastructure, and pays a ransom or extortion...

Aug 12 · 9 min read >