This article contains details on validating the origin and integrity of the latest version of Nova

Nova 11.9 Checksum

The SHA256 checksum of the Nova 11.9.zip archive, available at https://download.panic.com/nova/Nova 11.9.zip is:

d4e356e1cf733296c5e79ed827ef61aa546a90bb9d21526a0ef11def9caece1c

Validating the Checksum

1. Download Nova 11.9.zip
2. Run the following command in Terminal to compute the checksum of your copy:

$ shasum -a 256 ~/Downloads/Nova\ 11.9.zip

If the hash portion of the command output matches the checksum above:

d4e356e1cf733296c5e79ed827ef61aa546a90bb9d21526a0ef11def9caece1c  /Users/panic/Downloads/Nova 11.9.zip

you can be sure that your copy of the download is identical to the version on our website.

Unfortunately, validating the checksum alone does not guarantee that the contents of Nova 11.9.zip haven’t changed since we posted it*. However, with one extra step you can also determine with certainty that the checksum above, and therefore the contents of the ZIP, originated from Panic.

*Why not? In the very unlikely circumstance that a malicious actor replaced the ZIP archive on our website and modified the contents of this article using a new SHA256 hash, the checksum could still validate.

Nova 11.9 Checksum Signature

Using our public profile on Keybase, we have PGP-signed the SHA256 checksum from above:

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512

d4e356e1cf733296c5e79ed827ef61aa546a90bb9d21526a0ef11def9caece1c
-----BEGIN PGP SIGNATURE-----

iQEzBAEBCgAdFiEE6i1R0iW3pPNCW77Iq26O7ibMLj0FAmXnkfQACgkQq26O7ibM
Lj0BLggArdGui640BqzJXXjzLXNEWfVTFGE3vBlrY3cuA2fkagrcoxHfxXWl4Cxw
wDUPi9qIZJm/pTbUU1Oum19loBfyqbmDp3ARkpZv9b49Z0FvGuPxrs09jASPCMi9
XDFkcYXbgWjm9paxMegtJu0dxPK/D+KQhK8H/Mz+rHfq7jjmsP/Boq4DbrHZAG2K
pc3zdEUg0US5brQ/qBv+9Fbyrc3wqm2f6cRQn7xpFQe1/4GJyebbS+twN7e9iJKU
fIouESyTpN+PrERqQ2nK3G7wiZpd/t5KuGNqW/Fw8pbQ5XAuWuYUelpbi8zOoOza
gKlX+jNychSgN/mkOvNhmhFdhRZ/cQ==
=XgaO
-----END PGP SIGNATURE-----

Validating the Signature

1. Copy the entire PGP message above, including -----BEGIN PGP MESSAGE----- and -----END PGP MESSAGE-----
2. Paste the contents into the Message to verify box on Keybase
3. Click Verify

Most importantly, Keybase should indicate that the message was signed by Panic:

Additionally, the resulting Signed Text should match our original checksum:

d4e356e1cf733296c5e79ed827ef61aa546a90bb9d21526a0ef11def9caece1c

If both items match, you can be sure that the checksum in this article originated from Panic.

Putting it all together

By using two factors of validation:

• A checksum which ensures that your copy of Nova 11.9.zip is identical to the copy on our website
• A PGP signature which ensures that the checksum originated from Panic

you can be sure that you are installing the release that we originally posted.

Support

We are more than happy to answer questions or help provide any guidance you might need to validate the checksum and signature for this release. Please email us, nova@panic.com.