Search icon CANCEL
Subscription
0
Cart icon
Your Cart (0 item)
Close icon
You have no products in your basket yet
Arrow left icon
Explore Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Free Learning
Arrow right icon
Arrow up icon
GO TO TOP
Foundations of Blockchain

You're reading from   Foundations of Blockchain The pathway to cryptocurrencies and decentralized blockchain applications

Arrow left icon
Product type Paperback
Published in Jan 2019
Publisher Packt
ISBN-13 9781789139396
Length 372 pages
Edition 1st Edition
Languages
Concepts
Arrow right icon
Author (1):
Arrow left icon
Koshik Raj Koshik Raj
Author Profile Icon Koshik Raj
Koshik Raj
Arrow right icon
View More author details
Toc

Table of Contents (14) Chapters Close

Preface 1. Introduction FREE CHAPTER 2. A Bit of Cryptography 3. Cryptography in Blockchain 4. Networking in Blockchain 5. Cryptocurrency 6. Diving into Blockchain - Proof of Existence 7. Diving into Blockchain - Proof of Ownership 8. Blockchain Projects 9. Blockchain Optimizations and Enhancements 10. Blockchain Security 11. When Shouldn't We Use Blockchain? 12. Blockchain Use Cases 13. Other Books You May Enjoy

Cryptographic hashing

A cryptographic hash function is a type of function that maps arbitrary sized data to a fixed size string called a hash. Hash functions possess certain properties that make them ideal for use in cryptography.

Hash functions are widely used in hash table data structures. A hash table stores the data in a key-value pair. Hash tables are used when large keys need to be converted into smaller keys using a hash function, and then the values are mapped to these smaller keys. This makes the mapping of key to value quite easy, and this could be achieved in O(1) time complexity. This is due to the fact that hash functions have a constant time complexity.

We have repeatedly mentioned that hashing is the backbone of blockchain architecture, and it has several properties that make it really valuable and ideal for blockchain implementation.

Every hash function has the...

lock icon The rest of the chapter is locked
Register for a free Packt account to unlock a world of extra content!
A free Packt account unlocks extra newsletters, articles, discounted offers, and much more. Start advancing your knowledge today.
Unlock this book and the full library FREE for 7 days
Get unlimited access to 7000+ expert-authored eBooks and videos courses covering every tech area you can think of
Renews at $19.99/month. Cancel anytime
Banner background image