A lot of people talk about cybersecurity, but are you familiar with the reasons why it’s so important? We are currently living in the digital era, which values data above everything else. We cannot ignore the fact that the security of personally identifiable information is currently at an all-time low. We frequently hear about examples of identity theft and data breaches that affect millions of customers. The WannaCry ransomware attack occurred almost two years ago and locked the data on millions of devices. You can play a part in the struggle to protect corporations’ and institutions’ data from being hacked or stolen by cybercriminals, which is a war that every company and organization is engaged in. The term “cybersecurity” can refer to not only corporations but also individual devices such as mobile phones, tablets, and personal computers.
What exactly does “cybersecurity” mean?
First things first: before we get started with this cyber security for beginners guide, let’s make sure we have a solid understanding of what precisely cyber security is and why it is important. Cybersecurity refers to both the technology and the process that are designed to secure networks and devices from being attacked, damaged, or accessed without authorization. Since data is now the foundation of any organization, it is necessary that any and all organizations, including the military of a country, hospitals, huge firms, small businesses, and other organizations and individuals, practice adequate cybersecurity. There is a high level of danger involved if such data are used in any way. After gaining an understanding of what cybersecurity is, the next step is to examine the CIA triad and determine how it is connected to cybersecurity.
CIA Triad
The confidentiality, integrity, and availability of an organization’s data are the foundational tenets of sound information security. And next, in this cyber security for beginners video, we will learn about the CIA Triad, which has served as the industry standard for computer security ever since the time of the first mainframes. CIA stands for the Committee for the Improvement of the American Economy.
• Confidentiality: The principles of confidentiality state that only authorized parties can access sensitive information and functions. This is one of the most important aspects of confidentiality. Example: military secrets.
• Integrity: According to the principles of integrity, only authorized individuals and means have the ability to change, add to, or remove sensitive information and functions. Take, for instance, a user who intentionally enters inaccurate data into the database.
• Availability: According to the principles of availability, systems, services, and data have to be available on-demand in accordance with the parameters that have been agreed upon, which are based on the levels of service.
In the next part of this tutorial on cyber security for beginners, we’ll examine the various subfields and areas of concentration within the field in order to gain a deeper comprehension of it.
Various Cybersecurity-Related Specializations
This lesson on cyber security for beginners will assist you in gaining an understanding of the various subfields that can be pursued within the field of cybersecurity, which is necessary for pursuing a career in the field. There are a total of nine:
1. The purpose of access control systems and methodologies is to safeguard vital system resources against unauthorized alteration.
2. Telecommunications and network security: This focuses on the potential vulnerabilities connected with communications, protocols, and network services, as well as the communications themselves.
3. Practices in security management: this sector efficiently deals with catastrophic failures of systems, natural disasters, and other sorts of service interruptions.
4. The implementation of security rules and procedures is the primary emphasis of both the security architecture and the security models. Planning security policies for pretty much any conceivable threat is included in the scope of this particular security area.
5. This section addresses the legal concerns that are related with computer security and includes discussion of inquiry and ethics.
6. This individual is responsible for the security of application and system development, and their responsibilities include the installation of multilevel security for internal applications and the coverage of database security models.
7. Cryptography is a field that focuses on teaching people how and when to employ encrypted communication.
8. Computer operations security is a broad term that encompasses all of the activities that take place while your computers are operational.
9. In this section, the primary focus is on addressing questions regarding the actual access that users have to their servers and workstations.
asic Terminologies
The next thing on the agenda is a lesson on cyber security for beginners, which will assist you in comprehending some of the terminology that you should already be familiar with before learning anything further about cybersecurity.
1. Network
A connection that allows two or more computers to talk to one another is known as a network. A network can connect any number of computers.
2. Internet
Through the use of specialized routers and servers, a computer can become connected to any other computer, located anywhere in the globe, thanks to the Internet.
3. Protocols used by the Internet
There is no way for the data to take any route when it is being sent or received. Controlling the flow of traffic on the internet requires adhering to a predetermined set of guidelines. The term for these guidelines is “internet protocol.”
4. Addresses on the Internet Protocol (IP)
An Internet Protocol address, often known as an IP address, is a unique numeric identifier that is allotted to each and every device that connects to a computer network and communicates via the Internet Protocol. An IP address looks like this: 168.192.10.3
5. MAC Address
This is a one-of-a-kind identifier that is stored in each and every electronic gadget that may connect to the internet. Hexadecimal integers consisting of 12 digits make up traditional MAC addresses. The format of a MAC address is as follows: D8-FC-93-C5-A5-EO.
6. Servers for Domain Names (DNS)
Think about DNS as the internet’s equivalent of a phone book. It remembers not only the names of the links but also their associated IP addresses. Take, for instance, the fact that you wish to go to google.com. You are entering this information into your online application. After that, this name is sent to the DNS server, and the DNS server locates the IP address that corresponds to google.com. After that, the DNS server will send the information along with the IP address back to your computer.
7. DHCP
Any electronic equipment that intends to connect to the internet can obtain an IP address through the use of a technique known as dynamic host configuration protocol.
8. Router
This is a device that reroutes the data that is sent to it after it has been received, and it then transmits that data to the destination in order to verify that it is traveling along the correct path.
9. Bots
Bots are programs that run in the background of your computer and take control of it without your awareness. They will send emails, fetch web pages, and make adjustments to the computer settings automatically.
The Most Common Forms of Attacks
This tutorial on cyber security for beginners will help you understand everything from A to Z about both the types of attacks and the reasons why they occur before we move on to discussing the specific forms of attacks themselves. There is always a motive behind an attack, and the primary reason that attacks are carried out is money. After breaking into the system, hackers will demand a ransom from the people they victimized. Other motivations include inflicting a financial loss on the target, contributing to the accomplishment of a state’s military purpose, tarnishing the reputation of the target, and engaging in political maneuvering.
There are primarily five different kinds of assaults:
1. DDoS, which stands for distributed denial of service (DDoS)
2. Position of the mediator
3. Email attacks
4. Attacks using a password
5. Attack using malware
Let’s have a look at each attack in further depth as we go on to the following portion of this cyber security for beginners tutorial:
1. DDoS, which stands for distributed denial of service
It is an attack that floods the traffic that is used to access resources in order to prevent a user from accessing those resources. This attack is used to restrict access to such resources. A botnet controller is responsible for exercising authority over all of the bots that report to it. The botnet controller receives a command from the attacker that instructs all bots to launch an assault against a specific server in order to flood that server with traffic. A user who attempts to access a website will be unable to do so because the volume of traffic on the website will have reached its maximum capacity.
2. Position of Neutrality
To have a better grasp on this concept, let’s look at an example. Let’s say you want to conduct a transaction online, so you log in to your bank account, make the payment, and then complete the transaction.
Now, in order to finish the transaction, you will need to provide the necessary information for your credit card, including the PIN. The adversary is able to impersonate you and watch over your transaction. After you have entered your information, he will be able to view it immediately.
3. Attack using a Password
We employ this method whenever we need to either locate a password or crack one. There are five different kinds of assaults against passwords:
• Attack via the Dictionary: When we use this technique, we try each and every password that may be found in the dictionary.
• Brute force is a process that involves trying different things in order to decode the password or the data. The most amount of time is required for this assault.
• Keylogger: A keylogger, as its name suggests, is a piece of software that logs all of the keystrokes made on a particular keyboard. The vast majority of hackers obtain login credentials and other sensitive information by using keyloggers.
• Shoulder surfing is when an attacker looks over the victim’s shoulder in order to see what they are typing on their keyboard.
• Rainbow table: Some rainbow tables have precalculated hash values. These tables are available. The table is utilized by attackers in order to discover the user’s password.
4. Email Attacks
To begin, let’s look at the operation of an email. Imagine that John is writing Jack an email right now. The email is sent to the email server in the beginning. After that, it contacts the DNS server in order to discover the IP address that belongs to the target. The email is transferred to the destination server from the email server that serves as the source. The email is then sent from that location to the IP address on which Jack is currently working. It is depicted in the image that can be found below.
There are three distinct varieties of email hacking.
In phishing, the perpetrator sends out a lure, which is most commonly in the form of an email. It encourages individuals to divulge their personal information.
The attacker will send you an email claiming to be from a respectable source while pretending to be another person or organization. This technique is known as spoofing.
Attachments to emails allow you to deliver files to recipients via email. These files could be pictures or papers, or they could contain audio or video. Attackers will send you an email with an attached file, and they will instruct you to open the file.
5. Attacks by Malware
• Malware is short for malicious software or programs that are designed to cause problems or damage to a computer. There are three distinct varieties of malicious software.
• Virus: A computer virus is a piece of malicious code that can spread from one computer to another by copying itself into another application or document. This code also alters the way a computer performs its tasks. In order for the virus to replicate, it needs someone to propagate the infection, either intentionally or unintentionally, without the awareness of a user or the approval of a system administrator. The Melissa virus serves as a good illustration of a virus.
• Worms are self-contained programs that are able to operate on their own and infect other computer systems. One such example is the worm known as W32.Alcra.F, which spreads itself through network share devices.
Activities Performed by Malware
1. Malware, particularly worms, has the potential to quickly spread throughout a system or network and use all of its available resources. Some malicious software will generate so many folders that the machine will run far more slowly as a result.
2. Developing a backdoor Let’s take an example of this: every Sunday, Microsoft sends out updates for all of the different versions of Windows. How exactly do these updates get installed on your Windows operating system? They establish backdoor access points from which they can transmit updates. In a similar manner, hackers will construct backdoors within a system so that once they have gained access, they may continuously send infections.
3. Disabling security functions Malware has the ability to disable security features such as antivirus software and security updates. Because there is no security to halt this infection, it has a tendency to remain active for longer. They frequently leave the system open to attack by other forms of malware.
4. Hackers create botnets by the use of coding alone to accomplish this task. A botmaster is someone who operates botnets, which are typically utilized to bring down websites. The botmaster instructs all of the botnets to flood the website by simultaneously accessing it with their browsers.
Origins of malicious software
1. Removable media: Viruses can be introduced into your system by a variety of removable media formats, including flash drives, CDs, DVDs, and Pendrives.
2. Documents and executable files: Viruses have been found to be able to hide in document files that have the extension.exe. The virus will begin to replicate itself as soon as you open them.
3. When downloading files via the internet, always sure you only use reputable websites. If you download from websites that cannot be trusted, there is a possibility that the files you download will contain viruses. As soon as you open those files, the hacker could potentially gain access to your computer system.
4. When it comes to your network connections, double check that the service provider you choose is legitimate. If the network is not properly secured, then it is possible for anyone to use it.
5. Attachments to emails: Never open a file in an email unless you are certain that you can trust the sender. It’s possible that these files include viruses that open backdoors.
6. Warning about potentially malicious advertisements: You should avoid clicking on adverts that you do not fully trust. They are designed to attract your attention so that you will click on them, at which point cybercriminals will obtain information about you.
Job Roles
Before you embark on a new career path, the kind of work that you do is unquestionably an aspect that you ought to give some thought to. In this part of the lesson on cyber security for beginners, we will learn about the most important jobs in the field of cybersecurity, including the following:
1. The Chief Information Security Officer is responsible for managing an organization’s information technology security department.
2. A forensic computer analyst is someone who investigates a breach or assault on an organization by searching for evidence.
3. The Information Security Analyst is responsible for the protection of an organization’s computer systems and networks.
4. Penetration Tester: A penetration tester is a highly skilled security person who spends their days attempting to break into computer and network security systems. Penetration testers are also known as ethical hackers.
5. As an IT Security Engineer, you should make a plan to carry out security measures in order to monitor and safeguard data and systems from hackers and other forms of cyber assault.
6. Maintaining an organization’s network security is one of the responsibilities of a security architect.
7. Installing, administering, maintaining, and troubleshooting problems with a computer’s, network’s, and data’s security systems are the tasks of a security systems administrator.
8. Protect the sensitive data of the firm, advises the IT Security Consultant.
Certifications in Information Technology Security
If you want to start a career in the cybersecurity area, you need to be familiar with the credentials that are required to enter this field in the first place. Are you curious about what they are? This cyber security for beginners guide will walk you through all you need to know, including this. The following are the three most important certifications:
CEH is an abbreviation for “Certified Ethical Hacker.” If you take the Certified Ethical Hacking (CEH V10) Course, you will receive instruction in reverse engineering, which will enable you to better secure corporate infrastructures from data breaches.
CompTIA Security+: The CompTIA Security+ Certification is recognized all over the world as a reliable means of validating fundamentally sound, vendor-neutral information technology security knowledge and skills.
The Certified Network Defender (CND) Certification gives students an array of tools to provide real-world knowledge on current network security approaches. This certification covers the topics of defending, identifying, and responding to network security threats.
There is a lot of data to suggest that cybersecurity professionals are in high demand right now. It is difficult to accurately estimate either the supply or demand of labor in this industry, yet this demand will continue to increase. The most important factor contributing to the expansion of this sector is the continuous development of new technological capabilities. Because of the interconnectedness of the world’s economy and its various modes of communication, it is encouraging that all nations are cooperating to limit the number of cyberattacks. Computer science and information technology are not the only fields in which knowledge and experience are required; cybersecurity is a multifaceted topic that requires knowledge and competence from a wide range of fields.
This cyber security for beginners guide will cover everything you need to know about the principles, basic terminologies, and certifications as well as cover the material. And if you believe that you are prepared for a challenging yet exciting field like cybersecurity, you should check out Simplilearn’s comprehensive Cybersecurity Training program. This program covers everything from cyber security for beginners to advanced networking skills that are necessary to build a successful career.
