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

Nova 6.2 Checksum

The SHA256 checksum of the Nova 6.2.zip archive, available at https://download.panic.com/nova/Nova 6.2.zip is:

77b8591065a8f596a260a88f76a8bc1757ce71272723c4bf8fbd466e2dcade2d

Validating the Checksum

  1. Download Nova 6.2.zip
  2. Run the following command in Terminal to compute the checksum of your copy:
$ shasum -a 256 ~/Downloads/Nova\ 6.2.zip

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

77b8591065a8f596a260a88f76a8bc1757ce71272723c4bf8fbd466e2dcade2d  /Users/panic/Downloads/Nova 6.2.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 6.2.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 6.2 Checksum Signature

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

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

77b8591065a8f596a260a88f76a8bc1757ce71272723c4bf8fbd466e2dcade2d
-----BEGIN PGP SIGNATURE-----

iQEzBAEBCgAdFiEE6i1R0iW3pPNCW77Iq26O7ibMLj0FAmCQdxwACgkQq26O7ibM
Lj2nKQgAtaIJmdu7jQC+wNeVaxR/Yq5c+QNqaCozFKhVT3zCbeV8LSKkTiTnmzTK
7GbAsFTp5HGPO57NYdd0ghKW7/HAamhBrIAqyzYqWhT9nePuHucKQisUk4fUcOJY
LTB/1yQswXouKIVTvwGHfrGrZi48SLX/n9UxNYbLT0J9PI3wOPElouLU/P4gfdCF
AXVBYEQTGDOJ4iAISPenQyywYp3lpLx0XarigXeOC+BVbpMOyUPrP0Se9R9njxdK
IPr/1TQahyzIg+9xXeb8Wd6TJzn5mtfXBDsEehDOPTsBOWtBGKtQW/vMMEStty5J
Kg04/42Vxau0u7nz2LIxTNUFwcAJfQ==
=i4v3
-----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:

'Signed by panic' on Keybase

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

77b8591065a8f596a260a88f76a8bc1757ce71272723c4bf8fbd466e2dcade2d

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 6.2.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.

This article was last updated on September 14, 2020