this post was submitted on 09 Mar 2024
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The phrases used to describe the technology to the public may change, but the technolgical approach doesn't
There are hundreds of blockchain whitepapers, all of which link blocks of data via hash functions and only accept state changes if they are valid and cryptographicaly signed.
If we were discussing web3 or Metaverse then you may have a point. But no-one in tech is confused about what blockchain is anymore.
No.
Yes. Exactly this.
Optionally is the key word. Blockchain transactions must be signed, and they must be accepted as following the blockchain rules by validators.
Find me a blockchain that doesn't require signed transactions to make state changes.
I didn't say anything about modify the chain.
A commit can contain any data it likes. A commit to a blockchain is highly restricted. Only cryptographicly valid rule following changes are allowed to blockchain state.
But this is just a policy decision, not a property of the technology. You can easily implement a script that checks if every commit from remotes are signed, accepts them if they are and drops them if they aren't or the signature is invalid.
If you contribute to a project where the majority require signed commits, then you need to sign commits in order for your change to be integrated into the consensus.
That has nothing to do with the technology itself, just with the application.
So if you state that signatures are required to be a blockchain, then you can use git to create a blockchain, by just having that policy.
(IMO I wouldn't say that signatures are required, just that blockchains usually have them.)
Now add some logic to check whether the actual data is valid (i.e. bob has enough coins in his account to send to Charlie).
Make some incentive to ensure only the main branch survives and forks are either eliminated or merged.
Automate
Now git replicates blockchain's functionality.
Yes, but add automatically processing the content of the commit for validity and incentives to reduce the number of forks.
Without public key cryptography you just have a hash linked list (like Git).