Articles I've written

Slovak websites in the “Collection #1” password database and friends
January 23, 2019

Yesterday I checked Czech websites in “Collection #1” and others (like “Collection #2” to “Collection #5”, “BigDB”), today I've checked Slovak sites. We're neighboring countries and historically have a lot in common, many Czech users have accounts on Slovak sites as well, so it seemed like a good idea.

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Czech websites in the “Collection #1” password database and friends
January 22, 2019

Last week was all about the 773 million records data breach, nicknamed “Collection #1”. It's a few years old compilation of previous data leaks but it's still interesting to check which Czech websites (and Slovak, too) are present in this and other databases (like “Collection #2” to “Collection #5”, “BigDB”).

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Upgrading existing password hashes
September 5, 2017 (updated March 20, 2024)

Still using MD5 or SHA-1 to store user passwords and want to gracefully migrate to e.g. bcrypt? Want to do it properly to protect all passwords in the database? Here's how.

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