Tag

Security

The technical heart: vulnerability research, disclosure, threat analysis, the craft of finding and fixing

Security

WTF is going on with TCP:0?

tl;dr: 0.06% of the publicly-addressable IPv4 space is listening to and responding on TCP Port 0. Why? idk... Note: Never interact with a computer system beyond you

By Casey Ellis · 30 Jul 2020
Security

A few good cybersecurity companies

I spend a lot of time looking at cybersecurity solutions and companies, partly on request, and partly because it always fascinates me to see people are attempting to solve big problems.

By Casey Ellis · 17 Jul 2020
Security

Priority One: Insights into Submission and Payment Trends

2020: Chaos is a Ladder As 2020 comes to a close, I’ve started to see summaries of the year pop up, covering lessons learned from the year nobody saw coming… As years g

By Casey Ellis · 16 May 2020
Security

To err is human — Kerckhoffs' Principle in Software Transparency

Shannon and Kerckhoff were pioneers of disclosure thinking — They understood the concept of “build it like it’s broken”. This was especially true in WWII cryptography, but it’s becoming increasingly clear in its relevance to the 'peacetime' software that we use today.

By Casey Ellis · 08 Apr 2020
Security

Hacking styles

Broadly, there are two things that come into play when it comes to the style a person applies to hacking: The level of experience, and the overall wiring of the hacker.

By Casey Ellis · 29 Mar 2020
Security

A message to folks providing "free testing" at the moment

TLDR: If you’re performing any active, unsanctioned testing on healthcare systems: Please stop it. Don’t make their job any harder than it is right now.

By Casey Ellis · 28 Mar 2020
Security

COVID-19/Coronavirus — What are the bad guys up to?

As expected, the covid19 pandemic has out brought some of the Internet’s worst. I’ve been working with several groups to information share and fight back on this stuff, including the COVID-19 CTI Group.

By Casey Ellis · 28 Mar 2020
Security

Changes

You know that awkward thing at the moment when you see someone and go to shake their hand or hug them, then pull away… and then feel like a jerk because of the implied so

By Casey Ellis · 23 Mar 2020
Security

The importance of delivering well

In general, people like to be think they have the ability to assess risk… you see it in kids jumping over puddles, you see it in adults with the stock market. Society loo

By Casey Ellis · 23 Mar 2020
Security

On #stopthespread and school closures

On the decision to keep schools open in Australia yesterday: It’s not that kids don’t catch covid. It seems that everyone catches covid. * According to the Australian

By Casey Ellis · 22 Mar 2020
Security

Tools for the WFH apocalypse

Well… It’s been an interesting couple of weeks. Viv, the kids, and I decided to bug out back to Australia last Thursday to care for our parents while the COVID-19 situat

By Casey Ellis · 20 Mar 2020