Application of Blockchain and Internet of Things to Ensure Tamper-Proof Data Availability for Food Safety

Table 2

Classification of blockchains.

	Public blockchain	Private blockchain	Permissioned blockchain
Read access	No permission required from any authority	Read access is private within organization participants	Public/participants are permissible under some legal contracts
Write access	No permission required from any authority	Write access is private within organization participants	Participants are permissible under some legal contracts
Consensus process	Anyone can join consensus process	Pre-selected nodes within organization	Pre-selected nodes within consortiums