[Retracted] Sports Injury Risk Assessment Based on Blockchain and Internet of Things

Table 2

Structure of new block body.

Attribute	Individual meaning
Type	0x00 stores type of things
Company	The number of the company is convenient for identity verification and ensures the global uniqueness of ID.
device_code	The number of the device is convenient for identity verification and ensures the global uniqueness of the ID.
dh_value	Field required for Diffie-Helman authentication, which is a struct, including a prime number and its source root.
ffs_value	The gateway node proves the set of global parameters through the zero recognition generated by its own random number .
new_ffs_value	The updated set of zero recognition proof global parameters, which is empty when new devices are registered.
envelope_pk	Public key for envelope encryption.
Calculate	Node computing power weight is used to balance the computing power between nodes and improve efficiency.