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-2.2.0.dmg
30b70ced0b60e78c973c63e4b415aa866eee4739763b76c52a0422c66d34bd40Download for Mac
$ certutil -hashfile Jaxx.Liberty-setup-2.2.0.exe sha256
6a3b6126d9069aa0a6c7d8c293317151cefd7d8cd910ab29a9d68bf096ee789bDownload for Windows
$ shasum -a 256 com.liberty.jaxx-2.2.0-i386.AppImage
d828a11855d67af1041c07471c73a214cf7c7e03914561694853b7eb0f32b533Download for Linux 32
$ shasum -a 256 com.liberty.jaxx-2.2.0-x86_64.AppImage
32eb2aa0dbc364dfa9674c79d4a579c126ec5ca884c289eb5f2f951ad2b19778Download 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.