Search icon CANCEL
Subscription
0
Cart icon
Your Cart (0 item)
Close icon
You have no products in your basket yet
Save more on your purchases now! discount-offer-chevron-icon
Savings automatically calculated. No voucher code required.
Arrow left icon
Explore Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Conferences
Free Learning
Arrow right icon
Arrow up icon
GO TO TOP
C# 8.0 and .NET Core 3.0 – Modern Cross-Platform Development

You're reading from   C# 8.0 and .NET Core 3.0 – Modern Cross-Platform Development Build applications with C#, .NET Core, Entity Framework Core, ASP.NET Core, and ML.NET using Visual Studio Code

Arrow left icon
Product type Paperback
Published in Oct 2019
Publisher Packt
ISBN-13 9781788478120
Length 818 pages
Edition 4th Edition
Languages
Tools
Arrow right icon
Author (1):
Arrow left icon
Mark J. Price Mark J. Price
Author Profile Icon Mark J. Price
Mark J. Price
Arrow right icon
View More author details
Toc

Table of Contents (21) Chapters Close

1. Hello, C#! Welcome, .NET! FREE CHAPTER 2. Speaking C# 3. Controlling Flow and Converting Types 4. Writing, Debugging, and Testing Functions 5. Building Your Own Types with Object-Oriented Programming 6. Implementing Interfaces and Inheriting Classes 7. Understanding and Packaging .NET Types 8. Working with Common .NET Types 9. Working with Files, Streams, and Serialization 10. Protecting Your Data and Applications 11. Working with Databases Using Entity Framework Core 12. Querying and Manipulating Data Using LINQ 13. Improving Performance and Scalability Using Multitasking 14. Practical Applications of C# and .NET 15. Building Websites Using ASP.NET Core Razor Pages 16. Building Websites Using the Model-View-Controller Pattern 17. Building Websites Using a Content Management System 18. Building and Consuming Web Services 19. Building Intelligent Apps Using Machine Learning 20. Building Windows Desktop Apps 21. Building Cross-Platform Mobile Apps Using Xamarin.Forms

Signing data

To prove that some data has come from someone we trust, it can be signed. Actually, you do not sign the data itself; instead, you sign a hash of the data.

We will be using the SHA256 algorithm for generating the hash, combined with the RSA algorithm for signing the hash.

We could use DSA for both hashing and signing. DSA is faster than RSA for generating a signature, but it is slower than RSA for validating a signature. Since a signature is generated once but validated many times, it is best to have faster validation than a generation.

More Information: The RSA algorithm is based on the factorization of large integers, compared to the DSA algorithm, which is based on the discrete logarithm calculation. You can read more at the following link: http://mathworld.wolfram.com/RSAEncryption.html

Signing with SHA256 and RSA

Let's explore signing data and checking the signature with a public key.

  1. In the CryptographyLib class...
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