Encrypting decrypting messages

To determine whether or not the incoming message has been signed or digitally encrypted you need to look at the information bar above the message body.

If the message has been encrypted and signed, the green bar also displays the text "Decrypted message". If you believe that your private key has been "compromised" that is, someone else has had access to the file that contains your private key , you should revoke your current set of keys as soon as possible and create a new pair.

To revoke your current set of keys:. Send the revocation certificate to the people you correspond with so that they know that your current key is no longer valid. This ensures that if someone tries to use your current key to impersonate you, the recipients will know that the key pair is not valid. Grow and share your expertise with others.

Answer questions and improve our knowledge base. Search Support Search. Note: This article applies to Thunderbird 68 and earlier versions.

The public key is the function of both e and n i. The private key is the function of both d and n i. Search for: Search. Skip to content.

Note in production we recommend you always use the token authentication scheme for browser clients, however in this example we use an API key for simplicity. Simply add it to the package. API keys used with basic authentication for your own servers is generally preferred, however, clients running on insecure devices should always use the token authentication scheme instead. In this example, we use an API key for simplicity. Add the following to constants.

Note: A sample cipher key is provided here for simplicity. Alternatively, one could use the io. Note that the cipher key should not be a pass-phrase, but a cryptographic key — generated from a secure random source, or bits long, binary or baseencoded. If you wish to encrypt messages with a pass-phrase for example, one entered by a user , you should use a key derivation function to transform that into a key.

A sample cipher key is provided here for simplicity. Alternatively, you may use an Ably utility Ably. We have now shown you how to install Ably, then we published an encrypted message on a channel, and later retrieved it using the encryption API.

In this demo, we use the encryption API to publish and retrieve encrypted messages. The complete source code for each step of this tutorial is available on Github. Open 2 terminal windows and cd into the root of your project, e. Go back to your first terminal window and you should see the message in your terminal.

And there you have it, a fully functional publish-subscribe demo with encryption enabled. Make sure to add your Ably API key to constants. If you would like to find out more about how to use the encryption API from your devices and apps, see the Realtime encryption documentation.

Learn more about Ably features by stepping through our other Ably tutorials 3. Gain a good technical overview of how the Ably realtime platform works 4. Get in touch if you need help. Get in touch via our contact page. I forgot my password. Login with SSO. You can either create a new application for this tutorial, or use an existing one.

You will need it for this tutorial.