Are block timestamps decentralized?

by JBrouwer   Last Updated May 15, 2019 19:28 PM

One thing I don't understand about the Ethereum protocol is how timestamps work. If I, as miner, have a reason to fiddle with timestamps (such as adding a few minutes to decrease the mining difficulty) I simply produce a block with a timestamp which is a few minutes larger than the current UNIX time.

I suppose that this is not possible, but I don't understand how this is enforced. Does the network simply not allow blocks which have a drift time which is too large compared to the current time? Or is there some kind of protocol in place which disencourages miners to create invalid timestamps?

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