Post a secret.
Reveal the key later.
Write a short message, encrypt it with the public key, and post the result in the class Facebook group. When the private key is released, see if you can uncover a classmate's message.
The public key is for everyoneAnyone can use it to encrypt a message.
The private key comes laterIt unlocks the messages. Get it from the lesson attachment when your teacher releases it.
Try it yourself
TLSThe public key is built in. Write one sentence about the lesson, then copy the encrypted text and post it without giving away the answer.
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Copy the whole thing
This opens the class group and copies your encrypted text. Paste it into a new post; you choose when to publish.
View the built-in public key
This is the same key in the attached public-key.pem file. Sharing it is part of the activity.
After your teacher releases the private key in the lesson attachment, paste a classmate's encrypted post and add the key here.
or paste it above
The key stays in this browser tab. Never enter a real private key here.