Apple confirmed the rumors of the fingerprint scanner in the latest iPhone 5S and the rumors were confirmed at Samsung Unpacked 2014 last month. The fingerprint information is stored as an encrypted proprietary value, on the device itself. Samsung has yet to publish any information on their website, in the Samsung Galaxy S5s user manual, or any other channels, regarding the security measures that have been put in place to protect the biometric information. The data is never backed up to iCloud or stored on any third party servers.”]
Source: https://informationsecuritybuzz.com/articles/concerned-privacy-biometric-data/