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.

Read the article here


AddrJack – An Educational Bitcoin Address-Swapping Malware Demo

An educational malware demo showing how Bitcoin addresses can be detected and hijacked from the copy-paste buffer – thus sending funds to an attacker’s address instead of the intended recipient.

View the source on my Github


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.

Read the article here


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