 Security Guide for Beginners</a> (online OPSEC)</li>
            <li><a href="http://hacktownpagdenbb.onion/Links0/Chapter-1.html" title="OPSEC Guide" target="_blank" rel="noopener">Hacktown OPSEC Guide</a> (tor site)</li>
            <li><a href="https://blog.lopp.net/thoughts-on-secure-storage-of--bitcoins-and-other-crypto-assets/" title="Private Key Storage" target="_blank" rel="noopener">Thoughts on Secure Storage of Crypto Assets</a></li>
            <li><a href="https://github.com/jlopp/physical-bitc