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IT Security: Defense against the digital dark arts

1817 calificaciones

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Google

IT Security: Defense against the digital dark arts

1817 calificaciones

Curso 5 de 5 en SpecializationGoogle IT Support Professional Certificate

This course covers a wide variety of IT security concepts, tools, and best practices. It introduces threats and attacks and the many ways they can show up. We’ll give you some background of encryption algorithms and how they’re used to safeguard data. Then, we’ll dive into the three As of information security: authentication, authorization, and accounting. We’ll also cover network security solutions, ranging from firewalls to Wifi encryption options. Finally, we’ll go through a case study, where we examine the security model of Chrome OS. The course is rounded out by putting all these elements together into a multi-layered, in-depth security architecture, followed by recommendations on how to integrate a culture of security into your organization or team. At the end of this course, you’ll understand: ● how various encryption algorithms and techniques work as well as their benefits and limitations. ● various authentication systems and types. ● the difference between authentication and authorization. ● how to evaluate potential risks and recommend ways to reduce risk. ● best practices for securing a network. ● how to help others to grasp security concepts and protect themselves.

De la lección

Understanding Security Threats

Welcome to the IT Security course of the IT Support Professional Certificate! In the first week of this course, we will cover the basics of security in an IT environment. We will learn how to define and recognize security risks, vulnerabilities and threats. We'll identify the most common security attacks in an organization and understand how security revolves around the "CIA" principle. By the end of this module, you will know the types of malicious software, network attacks, client-side attacks, and the essential security terms you'll see in the workplace.

The CIA Triad2:31

Essential Security Terms4:11

Malicious Software5:05

Malware Continued2:50

Conoce a los instructores

Google

Let's pick up where we left off with Malware.

So far, we've covered some of the major types of Malware that can be found in the system,

including Malware, Viruses, Worms,

Adware, Spyware and Ransomware.

What if our attackers could not only do malicious things like steal our data,

but they could also steal our computers resources like the CPU?

Well, I'm sorry to tell you that actually exists.

There is Malware out there that can utilize

someone else's machine to perform a task that is centrally controlled by the attacker.

These compromised machines are known as Bots.

If there are a collection of one or more Bots,

we call that network of devices a Botnet.

Botnets are designed to utilize the power of

the Internet-connected machines to perform some distributed function.

Take mining Bitcoin, for example,

mining Bitcoin requires a machine to perform

some computation that takes up your machine's resources.

At the end, you may be rewarded with some amount of Bitcoin.

A popular attack has been creating Botnets to do stuff like mine Bitcoins.

So instead of having one computer run computations,

attackers can now have a thousand computers

running computations and raking in more and more Bitcoin.

A backdoor is a way to get into a system

if the other methods to get in a system aren't allowed,

it's a secret entryway for attackers.

Backdoors are most commonly installed after an attacker has

gain access to your system and wants to maintain that access.

Even if you discovered your system has been compromised,

you may not realize that a backdoor to your system exists.

If it does, you need to lock it up before more damage can be done.

Another form of Malware that can be particularly problematic is a rootkit.

A rootkit by its name is a kit for root,

meaning a collection of software or tools that an admin would use.

It allows admin level modification to an operating system.

A rootkit can be hard to detect because it can

hide itself from the system using the system itself.

Sneaky little sucker.

The rootkit can be running lots of malicious processes,

but at the same time those processes wouldn't show

up in task manager because it can hide its own presence.

A logic bomb is a type of Malware that's intentionally installed,

after a certain event or time has triggered,

it will run the malicious program.

There's a popular logic bomb case that happened in 2006,

wherein unhappy systems administrator at a bank,

set off a logic bomb and brought down

a company's services in an attempt to drop their stock prices.

The former employee was caught and charged with fraud,

then sentenced to eight years in prison.

Not the most logical Logic bomb.

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