Scott Helme - Scott Helme (Page 5)

Increasing entropy in our CSP nonces

I've talked many times about CSP and CSP nonces, the easy way to control JavaScript on your page, but someone recently pointed out an area we could improve....

PCI DSS 4.0; It's time to get serious on Magecart

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CSP

PCI DSS 4.0; It's time to get serious on Magecart

The latest version of PCI DSS just dropped and it's really awesome to see that one of the most notorious threats that we face online when it comes...

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Pwned Passwords

Re-bloom! Pwned Passwords v8

After the recent release of the Pwned Passwords v8 dataset, it was time to update my Bloom Filter implementation of Pwned Passwords! -------------------------------------------------------------------------------- Bloom Filters If you aren't...

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Security Headers

Can you get pwned with CSS?

I recently started to consider changing the grading criteria on Security Headers which isn't something that happens very often. I wanted to make a change that would result...

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Community

Projects I Support

As we roll further into 2022, I wanted to outline the projects and other activities in the community that I support in the hope that it might inspire you to...

If it looks like a duck, swims like a duck, and QWACs like a duck, then it's probably an EV Certificate

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EV

If it looks like a duck, swims like a duck, and QWACs like a duck, then it's probably an EV Certificate

For a little while now I've been following a new type of certificate that you may soon be hearing a lot more about. They're called a...

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Log4j

Responding to the Log4j 2 vulnerability (CVE-2021-44228)

This blog post isn't going to be a deep dive into the vulnerability itself, but instead how Report URI reacted as an organisation and the things we'...

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Crawler Report

Top 1 Million Analysis - November 2021

Wow! It's been quite a while since I've had time to do my regular analysis of security in the Top 1 Million site, but it'...

Frequency analysis on hundreds of billions of reports at Report URI: Top-K

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Probabilistic Data Structures

Frequency analysis on hundreds of billions of reports at Report URI: Top-K

After looking at how a Bloom Filter [https://scotthelme.co.uk/frequency-analysis-on-hundreds-of-billions-of-reports-at-report-uri-bloom-filters/] works and moving on to understand a Count-Min Sketch [https://scotthelme.co.uk/frequency-analysis-hundreds-billions-reports-report-uri-count-min-sketch/] , we were left with...

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Report URI

Report URI is now using CSP nonces in an enforced policy

Hurrah! Sometimes it takes a little while for projects to make it through your backlog and into production, but the nonce-based policy for CSP on Report URI can now be...