I’ve began studying the bitcoin blockchain from the technical perspective and whereas numerous issues do make sense to me instantly, I’m considerably confused about some particulars in regards to the proof of labor idea. Specifically, within the present implementation to successfuly mine the block one is required to seek out the quantity (nonce) such that the hash(block, nonce) returns n main zeros. This n is chosen by the community in such a method that hashpower of the community produces one block each T = 10 minutes. My query is: what if this method had decrease T?
My guess is: the decrease the T the upper is the chance – however the danger of what and why? For instance, which undesirable state of affairs is far more likely to occur in case T is simply 1 second? The solutions I’ve seen to this point that remotely appear to deal with this query: in case of larger T it’s tougher for the attacker to provide you with the longest chain that may persuade the community of his model of the historical past. However this argument doesn’t enchantment to me: if T is brief, sure the attacker will provide you with a given size of a series quicker than for an extended T, however it’s also as simpler for the remainder of the community to develop the prevailing department – so this doesn’t appear to supply any advantages to the attacker.
Is there some minimal T that makes the community safe, and if there may be, what does it depend on at the least qualitatively if no quantification is feasible.