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Public or private blockchain, what are the differences?
Public blockchain
Private blockchain
Owner
nobody
Unique entity
Unique entity Known identities of participants
No
Yes
Who can read?
Everyone
Only private consortium stakeholders
Who can write ?
Everyone
Approved stakeholders
Consensus method
Proof-Of-Work (PoW)
Proof-Of-Authority (PoA)
Energy consumption
High (mining)
Low
Database or blockchain, what are the differences ?
Database
Blockchain
Networks
__Centralisé
__Décentralisé
Database
Single copy
Duplicated on all nodes
Data security
Vulnerable
Secure (encrypted data)
Data integrity
Possible with administrator authorization
Modification and deletion not possible
Administration
Complicated
Easy
Management cost
High for key and certificate renewal and update
Low
Sturdiness
Low
High
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