TICE POWER BLOCK 3 SIGNATURE SERIE

If someone does not have an explanation of this model that is missing me, please be thankful, contact me!

The key word here is a signature. Block signing is really difficult. First I need time, do I mention about time? Therefore, if someone wants to change the contents saved in the past, you need to re-sign the block where the data is stored. Since the blocks are linked to each other, the signature of each block that appears after the block they are trying to manipulate must be recalculated. As this takes time, they may never keep up with the current data block, you just need to get the longest chain from the network think that's true

Briefly, a block chain is an infinite ledger stored as a series of contiguous blocks, each block containing a series of transactions. Each block has a unique signature, a number called "block hash" mathematically computed using the "contents" of the block. The important point to note here is that the content of each block also has important additional fields. "The signature is a block hash of the previous block in the chain." In this simple but elegant hacking, any transaction change or deletion within any block requires recalculation of the signature of that particular block . This means that you need to recalculate the signature of the next block (since the block signature before the contents of the next block was changed), and so on until the end of the block chain ledger.

A block chain is a cryptographically secure database that contains an immutable transaction history that includes a digital signature for each transaction. The digital signature of the block is generated using an encrypted hash function linking the new block to the previous block. Essentially, it's simply a huge ledger in the transaction history. The Block object stores three fields. A hash of the previous block, an array of strings containing a list of transactions, and its own hash. Pass the hash value of the previous block and the transaction array to the Block constructor to create a new block. The hash value of the block is generated by passing a hash of the previous hash value and a transaction array to the hash code function. The block chain is immutable. This is because once built it is encapsulated in blocks and becomes accessible only via the getter method.