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Who’s behind Blockchain?
The UK has also experimented with providing longer-term use of management consultancy techniques provided internally, particularly to the high-demand consultancy arenas of local government and the National Health Service; the Local Government Association’s Improvement and Development Agency and the public health National Support Teams; both generated positive feedback at cost levels considered a fraction of what external commercial consultancy input would have incurred.
Blocks hold batches of valid transactions that are hashed and encoded into a Merkle tree. Each block includes the hash of the prior block in the blockchain, linking the two. The linked blocks form a chain. This iterative process confirms the integrity of the previous block, all the way back to the original genesis block.
A hard fork term refers to a situation when a blockchain splits into two separate chains in consequence of the use of two distinct sets of rules trying to govern the system. For example, Ethereum has hard-forked to “make whole” the investors in The DAO, which had been hacked by exploiting a vulnerability in its code. In 2014 the Nxt community was asked to consider a hard fork that would have led to a rollback of the blockchain records to mitigate the effects of a theft of 50 million NXT from a major cryptocurrency exchange. The hard fork proposal was rejected, and some of the funds were recovered after negotiations and ransom payment.
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