     <li><a href="http://docs.electrum.org/en/latest/coldstorage.html" title="Electrum Guide" target="_blank" rel="noopener">Electrum Cold Storage Guide</a></li>
            <li><a href="https://glacierprotocol.org/" title="Glacier Protocol" target="_blank" rel="noopener">Glacier</a></li>
            <li><a href="/pdf/gregersen-gono-cryptocurrency-storage-white-paper.pdf" title="Glacier Protocol" target="_blank" rel="noopener">Gregersen-Gono Standard</a> (cold storage protocol)</li>
            <li><a href=