October 2018
Intermediate to advanced
530 pages
14h 25m
English
Content preview from Blockchain across Oracle
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Hashes
Until now, we have explored the concepts that make up a transaction and how you can send transactions yourself. One of these concepts is that transactions are signed. When a transaction is signed, it generates a hash or digital signature that is based on the content of the transaction. The hash verifies that the data sent in a transaction is not compromised or has not changed during its travel.
A hash is calculated by executing a hash function, which is called hashing. Before I go into the detail of the hash functions that are used within different blockchains, I'm first going to take you through the concept of such functions. A hash function takes any input data, and produces an output, which, based on the algorithm used, has a different ...
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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.