March 2014
Intermediate to advanced
936 pages
29h 2m
English
Content preview from Professional Java for Web Applications
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Chapter 25Introducing Spring Security
- Understanding authentication and authorization
- Integrating Spring Security
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WHAT IS AUTHENTICATION?
When many people think of authentication, they think of a mechanism that determines whether someone has access to a system. Although this process is related to authentication, it is actually authorization. When you check whether someone has access to some system, building, file, or other object, you are checking whether they are authorized to use the target resource in the requested manner. The first step to authorization is authentication. The president of a company may be authorized to view some confidential file, but until you authenticate his identity, you can’t be sure he is really the president or someone posing as the president. If he is someone posing as the president, you should not authenticate him and therefore not authorize him.
You encounter authentication and authorization on a daily basis. When you log in to your computer network at work in the morning, this authenticates you and establishes your identity. Your permissions on the network then determine which systems you are authorized to access based on your identity. If you go to pick up your niece from ...
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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.