The checksums below are a simple way for you to double-check the copy of Jaxx you are installing is genuine. You can match the checksum in your instance of Jaxx with the data below.
$ shasum -a 256 Jaxx.Liberty-2.4.5.dmg
4175a0ec073bac64b7ef5e3e4ba4b762735be1586928d7adaba251d019553fe0Download for Mac
$ certutil -hashfile Jaxx.Liberty-setup-2.4.5.exe sha256
74a40a5c15e604b7a1f10de27c4b83ea319fb15d8a0e1fa638a693e5436e0454Download for Windows
$ shasum -a 256 Jaxx.Liberty-2.4.5-i386.AppImage
ef6d29d2fe5ce4df6cf714afe7eba2d2366e0d29222c6d124f4ea6e12b33d71dDownload for Linux 32
$ shasum -a 256 Jaxx.Liberty-2.4.5.AppImage
d2ffed97619c535e541f577c2a0faace245aaa78e06ea906e9a82cb99ce3979dDownload for Linux 64
*Mac OS X Note: Depending on your system settings, the system might warn you that "Jaxx can't be opened because it comes from an unidentified developer." You can either change your system settings to allow apps from unknown developers in your "Security & Privacy" settings, or simply right click Jaxx → Open (as administrator), which will prompt you with a warning.