  Blockchain has been emerging as a promising technology that could totally
change the landscape of data security in the coming years, particularly for
data access over Internet-of-Things and cloud servers. However, blockchain
itself, though secured by its protocol, does not identify who owns the data and
who uses the data. Other than simply encrypting data into keys, in this paper,
we proposed a protocol called Biometric Blockchain (BBC) that explicitly
incorporate the biometric cues of individuals to unambiguously identify the
creators and users in a blockchain-based system, particularly to address the
increasing needs to secure the food logistics, following the recently widely
reported incident on wrongly labelled foods that caused the death of a customer
on a flight. The advantage of using BBC in the food logistics is clear: it can
not only identify if the data or labels are authentic, but also clearly record
who is responsible for the secured data or labels. As a result, such a
BBC-based solution can great ease the difficulty to control the risks
accompanying the food logistics, such as faked foods or wrong gradient labels.
