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

Nova 9.6 Checksum

The SHA256 checksum of the Nova 9.6.zip archive, available at https://download.panic.com/nova/Nova 9.6.zip is:

fde34c19a80e166809c7ecaba1b7d0c73a148c0fbbb2a15f65e211e2fb1c5747

Validating the Checksum

1. Download Nova 9.6.zip
2. Run the following command in Terminal to compute the checksum of your copy:

$ shasum -a 256 ~/Downloads/Nova\ 9.6.zip

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

fde34c19a80e166809c7ecaba1b7d0c73a148c0fbbb2a15f65e211e2fb1c5747  /Users/panic/Downloads/Nova 9.6.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 9.6.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 9.6 Checksum Signature

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

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

fde34c19a80e166809c7ecaba1b7d0c73a148c0fbbb2a15f65e211e2fb1c5747
-----BEGIN PGP SIGNATURE-----

iQEzBAEBCgAdFiEE6i1R0iW3pPNCW77Iq26O7ibMLj0FAmMhEA0ACgkQq26O7ibM
Lj3iCwf7BCDxWyfis4BvPVi87B0/kobiu5b+64p4SEuuVSD2lduVibxtU4pv7OJY
Gj4xFQ1jZpxt5A87sDxug9A84osJp95zRhS1kxaprB4p84K1vXmcDbHNkcWW1ohl
4amJRrubvsUG/Q+ZVGC9D5J0gLjOD4uxW0FYAFcX5D6q6k5X6JZfwZO0RVTZGFdU
VbiqMYaLtYjLbRI/zHtMziuhnHHNiMDSweietYne4jAFEnJii+W4j8NvCroqJywS
XhjS3SkkB3gXd1830JPyV4TV5ZpQUB2cj09s+cab9iUi+uhEBQxq2kXZ4wSOeJmF
JXxch6MzP2T5MSqQdBR6dlchQvSXtg==
=qSEF
-----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:

fde34c19a80e166809c7ecaba1b7d0c73a148c0fbbb2a15f65e211e2fb1c5747

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 9.6.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.