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Learn

Processing experience into insight - retrospectives, lessons

Building

Techcrunch: Use ‘productive paranoia’ to build cybersecurity culture at your startup

At TechCrunch Early Stage, we asked Casey Ellis, founder, chairman and chief technology officer at Bugcrowd, to share his ideas for how startups can improve their security posture.

By Casey Ellis · 11 Sep 2020
Security

The Nth Country Experiment and Coincident Vulnerability Discovery

Nth Country Experiment - Nuclear MuseumCould any country with the right knowledge and technology build a nuclear bomb? From May 1964 to April 1967, the Lawrence Radiation

By Casey Ellis · 31 Aug 2020
Policy

Group Letter re IoT Cybersecurity Improvement Act (H.R. 1668)

We the undersigned cybersecurity companies and professionals write to express strong support for the IoT Cybersecurity Improvement Act (H.R. 1668). We respectfully urge you and your colleagues to support expedited passage of the bill before the end of the 116th Congress.

By Casey Ellis · 29 Aug 2020
Building

Public Comment from Casey Ellis, Bugcrowd re DRAFT BOD 20-01

Dear Director Krebs and CISA/DHS team, Thank you for the opportunity to comment on this Binding Operational Directive...

By Casey Ellis · 27 Aug 2020
Security

Forbes: Accelerating secure software development

7. Expect and plan for mistakes. Expect mistakes, and plan to capture and mitigate them quickly. After all, to err is human. Establishing a vulnerability disclosure and/o

By Casey Ellis · 09 Aug 2020
Policy

NIST SP 800-53 R5 adds Vulnerability Disclosure Programs to Federal Security and Privacy Controls

Earlier this week, the National Institute of Science and Technology (NIST) released Revision 5 of NIST Special Publication (800–53) Guidelines Security and Privacy Contro

By Casey Ellis · 07 Aug 2020
Policy

Help! I've found a vulnerability. What now?

"You've just found a bug on a company's website. What are the first three to five things you'll try in order to establish contact with them?"

By Casey Ellis · 04 Aug 2020
Policy

Disclose.io, VDP, Hackers, and voting

About 18 months ago, I sat in Capitol Hill with a bunch of other badasses including Matt Blaze, Kimber Dowsett, Jack Cable, Alexander Romero, Leonard Bailey, and others, and talked to voting machine manufacturers and US states.

By Casey Ellis · 04 Aug 2020
Security

WTF is happening on tcp:0? 2020 edition — Update 1

tl;dr: 0.06% of the publicly-addressable IPv4 space is listening to and responding on TCP Port 0. Why? idk…

By Casey Ellis · 03 Aug 2020
Building

WTF is happening on tcp:0? 2020 edition

tl;dr: 0.06% of the publicly-addressable IPv4 space is listening to and responding on TCP Port 0. Why? idk…

By Casey Ellis · 29 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