October 2018
Intermediate to advanced
530 pages
14h 25m
English
Content preview from Blockchain across Oracle
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Merkle tree
In the cryptography used in a blockchain, there is a fourth capability that ensures that the data is still valid, and that is a Merkle tree. The Merkle tree, or hash tree, is a tree of data blocks in which every leaf node is labeled by a hash or digital signature, and every non-leaf node (for example, the top of the tree) is labelled with the cryptographic hash of all of the digital signatures of its child nodes as its input. The hash tree is used by the blockchain to verify all data that is stored, processed, and transferred between nodes in the network. It can ensure that the blocks received from other nodes (peers) in the network are undamaged and unaltered, and it can verify that other peers do not send malicious data blocks ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.