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

Nova 8.2 Checksum

The SHA256 checksum of the Nova 8.2.zip archive, available at https://download.panic.com/nova/Nova 8.2.zip is:

e260177a6c3909cba6070d1c9fd3542231a24adc1082720aef822c9def8e7cd6

Validating the Checksum

  1. Download Nova 8.2.zip
  2. Run the following command in Terminal to compute the checksum of your copy:
$ shasum -a 256 ~/Downloads/Nova\ 8.2.zip

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

e260177a6c3909cba6070d1c9fd3542231a24adc1082720aef822c9def8e7cd6  /Users/panic/Downloads/Nova 8.2.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 8.2.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 8.2 Checksum Signature

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

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

e260177a6c3909cba6070d1c9fd3542231a24adc1082720aef822c9def8e7cd6
-----BEGIN PGP SIGNATURE-----

iQEzBAEBCgAdFiEE6i1R0iW3pPNCW77Iq26O7ibMLj0FAmGW7YQACgkQq26O7ibM
Lj0tewf/fTjd6Sljqf9yeG5S2e5m5XdwRz15Ltf0D3K7f6mBxHlYNTWF9mAkP2Ik
QzP1nInDYUEbtjg01B1st6sTWeYV41lDGKO49c3ck9wusHnIlHM0dBsOchtd12gK
LXAub01Z+3DGZLbJDmdNEE0CjGlu0EVznWGh/TuF7bdoIaKcotymuWLwq+IKFV0z
G48liO/VrRuMXsI1VOoCWGy1zROyFetjF+DXbNLLj5xRTW7wtrGbSbVbY5wWH68D
oiP42RLEwwXv8/rrr9Md9hEHBxBmtoZM2A+eNG7f3hlcMMVH+bPUmiaWIv7Hh0RF
nJe5H2dgS6tVNVlDn2VWB1GJB9PQOw==
=mi6M
-----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:

e260177a6c3909cba6070d1c9fd3542231a24adc1082720aef822c9def8e7cd6

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 8.2.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