Note that this is a large textarea to encourage you to enter a really long password (passtext?). Your password can contain any characters.
Enter a number between 100 and 10000 (ten thousand) and make sure that you do NOT forget this number. You will be asked to enter this number when loading your key. It's used as a kind of a password (the number of iterations for some cryptographic operations).
This application provides end-to-end (browser to browser, even Google won't have access to the encrypted messages) encryption and integrity verification (by using electronic signatures) for Gmail users. It does not require any installations. All you need is a modern browser. You can use it on multiple devices without hassle.
If you haven't done it already, you will be prompted to authorize this application to perform some actions on your behalf. It does not mean that this application will have access to your account without your consent or when you are offline etc. It will only work when you have a valid Google session in this browser instance. Without an active session, this application won't have any access to your account.

Feel free to review the source of this page and all included javascript files.

How it works:
  1. Sign in with your Google account
  2. If you don't have an existing key: Create a new key. Your key will be stored in your Google drive
  3. Load (unlock) your key (it will be downloaded from your Google drive and loaded)
  4. Add contacts / Read encrypted email / Send emails
Other things to note : See the documentation page for more information.