this post was submitted on 26 Jul 2023
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For a long time, I thought of the blockchain as almost synonymous with cryptocurrencies, so as I saw stuff like "Odyssey" and "lbry" appearing and being "based on the blockchain", my first thought was that it was another crypto scam. Then, I just got reminded of it and started looking more into it, and it just seemed like regular torrenting. For example, what's the big innovation separating Odyssey from Peertube, which is also decentralized and also uses P2P? And what part of it does the blockchain really play, that couldn't be done with regular P2P? More generally, and looking at the futur, does the blockchain offer new possibilities that the fediverse or pre-existing protocols don't have?

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So Google, Amazon, Apple, and many other large companies in the IoT space are using a blockchain as a federated data store: https://github.com/zigbee-alliance/distributed-compliance-ledger

It stores the data needed for Matter [ https://en.m.wikipedia.org/wiki/Matter_(standard) ] device attestation.

I think its an interesting use case on how entities that don't particularly trust each other can operate a federated system. Accounts are linked to an identity out-of-band in order to have write permissions to the chain. When an account writes, all the readers of the chain have reasonable assurances of the author of that write. No company can inject false state as another company without that company's guarded private key. All transactions are also auditable as an additional assurance the data isn't undergoing a malicious act.

tl;dr; interesting use cases for tamper proof federated ledgers.