Write your secret Key or shared combination in box 1 (yellow). To display the characters, check Show. As you type, a text below will tell you the strength of the key based on simple rules. Make sure to use $ymbol$, numb3rs, caPiTals, unusual words and mispelingss. You will need to enter your Key to unlock or sign messages.

To display the matching Lock in box 2 (green), click Make Lock.

If you have just clicked Make Lock, this box displays the Lock matching the key in box 1. Publish it so people can send you locked messages. You can email it with your default email client by clicking Email Lock.

To put somebody's Lock on a message so only that person can read it, enter it here. If you also enter your secret Key in box 1, the message will be signed as well as locked.

You will also need to enter here the sender's Lock if you have received a signed message from that person, or wish to verify his/her signature of a plain text.

To display a SHA256 hash of this box, click Show ID. This is useful for authentication purposes. It will appear in box 3.

To lock a text: Enter it into box 3 below (yellow). Make sure the appropriate items are in boxes 1 and 2, depending on the type of locking you want: shared combination in box 1 only for combination-lock, to be unlocked with the same combination, recipient's Lock in box 2 only for anonymous locked messages to be unlocked with the recipient's Key, both your Key in box 1 and recipient's Lock in box 2 for messages that are locked and signed. Then click the Lock button.

If boxes 1 and 2 are both empty, a prompt will ask for a Short msg Password (message length limited to 57 ASCII characters, non-ASCII characters use 6 spaces each, so avoid using accents, umlauts, etc.).

The locked text will appear in box 4 (green). You can send it with your default email client by clicking Email Text below.

To stamp a text with your key: Make sure your Key is in box 1 at the top (yellow). Then enter into box 3 below the text to be signed and click Stamp. The stamp will appear in box 4. Copy it and send it along with the plain text.

To unlock a locked text: Paste it into box 4 below, make sure your Key or shared combination (and maybe also the sender's Lock) are in boxes 1 and 2, depending on the type of locked text. The tags tell you what is needed: shared combination for combination-locked message (msc), your Key for anonymous locked message (msa), both your Key and the sender's Lock for signed message (mss), or none for short messages (no tags). Then click Unlock. In the case of short messages, a prompt will ask for the password. The plain text will appear in box 3.

To verify the stamp accompanying a text: Make sure the text is in the Plain Text box above (box 3) and the signer's Lock is in box 2. Then paste the stamp into box 4 below and click Verify. A popup will confirm whether or not the stamp has been verified.