[Retracted] The Security of Student Information Management System Based upon Blockchain

Table 1

Blockchain classification.

Attributes	Public chain	Alliance chain	Private chain
Participants	Anyone	Alliance member	Members in the organization
Read permission	Public	Public or restricted	Restricted
Consensus mechanism	Pow, PoS, dPoS	PBFS, RaFt	Solo PBFS
Efficient	Low	Low	High
Represent	Bitcoin	Hyperledger fabric	MultiChain