Featured Tutorials

Your Passwords Stink – And How to Fix Them

Learn about the basics of password security – length vs. complexity for security, and how they are stored and cracked. Finally, why using a password manager to generate and store secure passwords is a good idea.


Bitcoin Cryptography – Elliptic Curve Digital Signature Algorithms

Learn the basics of public-key cryptography used in systems like Bitcoin. This is a not-too-technical overview of elliptic curve cryptography.

Read the article here


Bitcoin Investment Scams, Investigated!

Hate scams? Me too! Learn about social engineering based attacks and how to avoid them. Keep you Bitcoin safe with free and open source tech education.

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DEFCON SafeMode – Building a Microcontroller Bitcoin Address Generator

My talk from this year’s DEFCON in Safe Mode, on building an open source, open hardware offline keypair generator for bitcoin, bitcoin cash, litecoin, ethereum, and digibyte.

View the slides here