They are replicated databases among a set of trusted nodes (validators). Have nothing to do with Satoshi's invention. Could have been around since the 1970s really.
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They are replicated databases among a set of trusted nodes (validators). Have nothing to do with Satoshi's invention. Could have been around since the 1970s really.
Wrong.
previous 00aaa926542a55e9ca9b9e678a93e6c6e4bf9c85 timestamp 2017-04-18T21:57:27 witness gtg transaction_merkle_root 382b5642e0c19f8558012e955eb81815d3322cafhttps://steemdb.com/block/11184423
I know you may think it's obvious, but you didn't state why pfunk.
Is it because each block is signed by a particular witness unlike Bitcoin?
Someone with enough knowledge to make a claim that something is or isn't a blockchain would take the hint.
The point I'm making is the block I linked, that included his comment saying that Steem could have been around in the 1970s, contains a reference block_id which includes a hash of the previous block.
The first 4 bytes of the block_id is the hexadecimally encoded block number and the following data is a truncated hash of the block.
Blockchains are created and verified by "chaining" together a series of data blocks that include cryptographic hashes to the previous block. The "chains" between old blocks and new are mathematically strong crypto hashes. Any attempt for a single party in a decentralized ledger to change transaction data in an old block will fail because it breaks verification of the chain.
that's also what git does, and git is not a blockchain. The Merkle Tree was patented in 1979.
You're missing the point. Read the other comment. Or just quit trolling if you know better.
I did. You're (almost) perfectly describing Merkle Trees.
How are you defining a blockchain?
Similarly to how Satoshi defined it: http://www.truthcoin.info/blog/private-blockchains/
I see. Thanks for pinpointing the source of confusion. When Satoshi wrote that, no other viable method of securing a blockchain had been invented yet. His comment in the Bitcoin code is not a dogmatic definition to last forever.
Proof of work is not required for a secure blockchain. PoS, DPoS, and other methods have since been developed that are able to securely produce a chain of blocks linked together with cryptographic hash references to previous blocks.