I voted it up solely because it was OCaml, haha. Not really too novel, I&#x27;m afraid, but an interesting take on the RSA SecurID via PAM nonetheless.<p>Tangentially, I think you can do this without Jailbreaking via services like : <a href="https:&#x2F;&#x2F;www.appaloosa-store.com&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.appaloosa-store.com&#x2F;</a>. Or maybe <a href="http:&#x2F;&#x2F;bumaociyuan.github.io&#x2F;ios&#x2F;2015&#x2F;07&#x2F;17&#x2F;self-signed-certificates-in-ios.html" rel="nofollow">http:&#x2F;&#x2F;bumaociyuan.github.io&#x2F;ios&#x2F;2015&#x2F;07&#x2F;17&#x2F;self-signed-cert...</a> and <a href="https:&#x2F;&#x2F;github.com&#x2F;bumaociyuan&#x2F;zxIpaServer" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;bumaociyuan&#x2F;zxIpaServer</a> though I might be wrong. (I.e., you no longer need to to JB, you an just put the signed .ipa on a website and it will install.) I haven&#x27;t had an iPhone in years to test it, but I&#x27;d be interested to know.