Yopass - Share Secrets Securely
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https://github.com/jhaals/yopass
Yopass is a project for sharing secrets in a quick and secure manner*. The sole purpose of Yopass is to minimize the amount of passwords floating around in ticket management systems, Slack messages and emails. The message is encrypted/decrypted locally in the browser and then sent to yopass without the decryption key which is only visible once during encryption, yopass then returns a one-time URL with specified expiry date.