Neat idea, but way too insecure for real life.<p>Slack&#x27;s Magic Links are a very user friendly and much more secure approach to a similar problem.<p><a href="http:&#x2F;&#x2F;louiiisechg.tumblr.com&#x2F;post&#x2F;130650909766&#x2F;slack-magic-link" rel="nofollow">http:&#x2F;&#x2F;louiiisechg.tumblr.com&#x2F;post&#x2F;130650909766&#x2F;slack-magic-...</a>