Privnote - Web note service that can be automatically destroyed

I just recommended the simple TinyPaste sticky notes, and now I'm going to recommend another online sticky note service with even higher security that can self-destruct automatically - Privnote. The service provided by Privnote is similar to TinyPaste: users input the information they want to share, submit it, and the system returns a URL for online sharing. However, the link returned by Privnote is time-limited and can only be opened once; after reading, it will automatically be destroyed. Also, the official website of Privnote mentions that if the sender allows it, they will be notified after the message has been read.