Re:Sweden’s central bank says it has begun testing an e-krona
by teh_infallible on Thursday February 20, 2020 @01:38PM
(#22377397)
Are blockchains inefficient if you’re not using proof of work? I thought it was the latter that was a source of inefficiency, and you don’t need PoW on a permissioned network.
[ Parent
| on HN ]
Re:Sweden’s central bank says it has begun testing an e-krona
by tzumby on Thursday February 20, 2020 @01:52PM
(#22377533)
If you're not using proof of work, blockchains start to look more like distributed storage with an audit trail and immutable row level db constraints
- if it's a Proof of Authority is like a way to deal with who has access to write to the db
- the distributed consensus part is well researched (Raft, Paxos etc)
The only advantage that I can think of is interoperability: you will be able to communicate with the public blockchain for point in time "backups". Also, building your internal smart contracts you can use an existing language like Solidity.
Re:Sweden’s central bank says it has begun testing an e-krona
by lawn on Thursday February 20, 2020 @02:44PM
(#22377919)
Even if you use some other consensus mechanism they're still inefficient. All full nodes in the network still have to propagate, validate and store all transactions forever.
This is indeed much more inefficient compared to a centralized solution and it's very difficult to create a decentralized network that can handle the amount of transactions that VISA processes for example.