We&#x27;re working on solving a few of these SSH issues at Userify[1] (SSH key management) but I think you&#x27;re right. Something like this could be even harder to spur adoption than SSL client certs, which browsers already support. (Here&#x27;s an article[2] from 1998... almost two decades ago!)<p>1. <a href="https:&#x2F;&#x2F;userify.com" rel="nofollow">https:&#x2F;&#x2F;userify.com</a><p>2. <a href="http:&#x2F;&#x2F;www.ibm.com&#x2F;developerworks&#x2F;lotus&#x2F;library&#x2F;ls-SSL_client_authentication&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.ibm.com&#x2F;developerworks&#x2F;lotus&#x2F;library&#x2F;ls-SSL_clien...</a>