Using keyoxide to verify your identity on mastodon

This option of identity verification is not as widely used, as it is more technical and requires advanced toolsets.

Keyoxide allows the linking of online properties together. To ensure it happens in a trustworthy manner, Keyoxide uses an open-source, decentralised and cryptography-based approach to bidirectional linking.

To use Keyoxide you need to create a PGP keypair. In this example, I will be using gpgtools for Mac, but other tools are available for most other OS's.

The process needed to allow verification is pretty simple

Create a GPG key pair;
Add Ariadne Identity metadata to the key;
Upload the key to OpenPGP.org and verify the key via the key’s email address;
Add the Keyoxide link to your Mastodon profile.

Create the GPG Keypair.

You create a GPG keypair using the gpg2 command from either GnuPG or PGPTools. Launch gpg2 and follow the prompts to generate the keys

gpg2 --full-generate-key

Once you have generated the keys you need to list your secret keys to find the one that you have just created.

gpg2 --full-generate-key

The output will show all the keys that are currently available, locate the key that you want to use for Mastodon, and copy the long alphanumerical string the corresponds to it in this case I only have one key and the my key’s fingerprint is: EA99B69EADBD4E5D65EBEF494140C46AF5E7D297

gpg2 --full-generate-key
 /Users/stephen/.gnupg/pubring.kbx
 ---------------------------------
 sec   rsa4096 2021-11-17 [C] [expires: 2024-12-10]
       EA99B69EADBD4E5D65EBEF494140C46AF5E7D297
 uid           [ultimate] Stephen Schwetz <stephen@schwetz.au>
 uid           [ultimate] Stephen James Schwetz <sschwetz@gmail.com>
 uid           [ultimate] Stephen James SChwetz <sschwetz@hotmail.com>
 uid           [ultimate] Stephen James Schwetz <sschwetz@yahoo.com.au>
 uid           [ultimate] Stephen Schwetz <stephen.schwetz@icloud.com>
 uid           [ultimate] Stephen Schwetz <schwetzy@icloud.com>
 uid           [ultimate] Stephen Schwetz <stephen@schwetz.com.au>
 uid           [ultimate] Stephen Schwetz <stephen@schwetz.id.au>
 uid           [ultimate] Stephen Schwetz <stephen@dot.id.au>
 ssb   rsa4096 2021-11-17 [S] [expires: 2024-10-30]
 ssb   rsa4096 2021-11-17 [E] [expires: 2024-10-30]
 ssb   rsa4096 2021-11-17 [A] [expires: 2024-10-30]

Now that we have the key we can add the required metadata to allow keyoxide to perform verification.

gpg2 --edit-key EA99B69EADBD4E5D65EBEF494140C46AF5E7D297

At the gpg2 prompt select the required the user id (the Key Owners name and email address and set the UID as primary in my case it will be my email address stephen@schwetz.au and is UID 1

 gpg> uid 1
 gpg> primary

Adding Aradine Metadata.

Keyoxide uses Ariadne metadata to allow it to recognise your Mastodon identity. The added metadata must start with proof@ariadne.id= and be followed by the URL of you Mastodon profile page I will be using mine https://neurodiversity-in.au/@Stephen

 gpg> notation
 proof@ariadne.id=https://neurodiversity-in.au/@Stephen 
 gpg> save

Export your Key and Upload to keys.openpgp.org.

The public key and its metadata needs to be extracted from your keyring and uploaded to keys.opengpg.org keyserver.

gpg2 --armor --export EA99B69EADBD4E5D65EBEF494140C46AF5E7D297 > pubkey.asc

The public key now needs to be added to the uploaded onto the openpgp.org keyserver.

If you are using GnuPG do not attempt to use —send-keys to upload the keys, as it strips out the metadata

Browse to https://keys.openpgp.org and select upload

You will then be presented with the upload screen, select the pubkey.asc file that was created earlier

Once completed click on upload

If the certificate has been changed you will need to send the verification email to each account and click on the link inside the email. Once this has been completed the key will be ready to be verified with Keyoxide.

Testing Keyoxide

To test browse to the url https://keyoxide.org/hkp/ and then the fingerprint of your certificate in my case the url would be https://keyoxide.org/hkp/EA99B69EADBD4E5D65EBEF494140C46AF5E7D297. You should see the site display the key and your primary email address.

Linking Mastodon and Keyoxide.

To add the signature, edit your profile; this can be done by clicking edit profile next to your avatar above the toot composition box. Inside the profile, scroll down to the Profile metadata and the fill in the first field with a description, I chose to use Cryptographically Verified. for the URL you need to put the url that you tested above, mine is: (https://keyoxide.org/hkp/EA99B69EADBD4E5D65EBEF494140C46AF5E7D297)