Penzu

 

Everybody has certain things they don't wish to share with others. That's why a secret diary is so important to many people. It gives you a safe place to go where you can write about anything from romances to future dreams. Since secret journals are intensely intimate, it's important that your privacy is protected. Keeping a diary in a physical notebook does not offer the security you need, as it can be lost, stolen, or damaged. So the question is, how to write a diary that is safe and secure? Fortunately, the digital age has made having such a diary much easier, though, as your journal can be protected with passwords, security questions, and more.

Note:  The above comes directly from their website.  Click here to read more.

Personal Note:  I am not convinced this would make a good journaling tool for students in our elementary schools.  However, it would make a fantastic daily diary for adults or even older teens.