A few weeks ago, a colleague showed me a small Sinatra application they had written to share small bits of sensitive text without any preconditions on the recipient. The application, which is very nicely branded as Onceler, will accept a small text snippet, store it in memory, and give the uploader a unique URL from which the secret can be downloaded. The recipient then visits the URL, which causes the secret to be downloaded, displayed, and deleted from the server’s memory.