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

Nova 1.0 Checksum

The SHA256 checksum of the Nova 1.0.zip archive, available at https://download.panic.com/nova/Nova 1.0.zip is:

c5414f5cf6888a8c53f91b53d5bdd1cd246e31aafad3c3bec381c10ef6a44a94

Validating the Checksum

  1. Download Nova 1.0.zip
  2. Run the following command in Terminal to compute the checksum of your copy:
$ shasum -a 256 ~/Downloads/Nova\ 1.0.zip

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

c5414f5cf6888a8c53f91b53d5bdd1cd246e31aafad3c3bec381c10ef6a44a94  /Users/panic/Downloads/Nova 1.0.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 1.0.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 1.0 Checksum Signature

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

-----BEGIN PGP MESSAGE-----
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=Mj5J
-----END PGP MESSAGE-----

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:

c5414f5cf6888a8c53f91b53d5bdd1cd246e31aafad3c3bec381c10ef6a44a94

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 1.0.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