Cybersecurity

Introduction to Cybercrime

• Computer crime, or cybercrime, is any crime that involves a computer and a network.
• The computer may have been used in the commission of a crime, or it may be the target.

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Types of Cybercrimes

1. DDoS Attacks
   DDoS Attacks are used to make an online service unavailable and take the network down by overwhelming the site with traffic from a variety of sources.
   
   
2. Botnets
   Botnets are networks from compromised computers that are controlled externally by remote hackers.
   
   
3. Identity Theft
   This cybercrime occurs when a criminal gains access to a user’s personal information to steal funds, access confidential information, or participate in tax or health insurance fraud.
   
   
4. PUPs
   PUPS or Potentially Unwanted Programs are less threatening than other cybercrimes but are a type of malware. They uninstall necessary software in your system including search engines and pre-downloaded apps.
   
   
5. Phishing
   This type of attack involves hackers sending malicious email attachments or URLs to users to gain access to their accounts or computer.
   
   
6. Online Scams
   These are usually in the form of ads or spam emails that include promises of rewards or offers of unrealistic amounts of money.
   
   
7. Exploit Kits
   Exploit kits need a vulnerability (bug in the code of a software) to gain control of a user’s computer. They are readymade tools criminals can buy online and use against anyone with a computer.

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What is Cybersecurity?
Cyber security, also referred to as information technology security, focuses on protecting
computers, networks, programs, and data from unintended or unauthorized access, change or destruction

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Why we need cybersecurity? (Importance of cybersecurity)

• Cybersecurity is essential for protecting our digital assets, including sensitive personal and financial information, intellectual property, and critical infrastructure.
• Cyberattacks can have serious consequences, including financial loss, reputational damage, and even physical harm.

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Network Security Solutions

1. Antivirus

• What is antivirus software?
  • Antivirus software (antivirus program) is a security program designed to prevent, detect, search and remove viruses and other types of malware from computers, networks and other devices.
  • Typically installed on a computer as a proactive approach to cybersecurity, an antivirus program can help mitigate a variety of cyber threats, including keyloggers, browser hijackers, Trojan horses, worms, rootkits, spyware, adware, botnets, phishing attempts and ransomware attacks.
    
    
• Antivirus software usually performs the following basic functions:
  • Scans directories or specific files against a library of known malicious signatures to detect abnormal patterns indicating the presence of malicious software.
  • Enables users to schedule scans so they run automatically.
  • Removes any malicious software it detects either automatically in the background or notifies users of infections and prompts them to clean the files.

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2. Intrusion Detection and Prevention

• What is Intrusion Detection and Prevention?
• • A system called an intrusion detection system (IDS) observes network traffic for malicious transactions and sends immediate alerts when it is observed. It is software that checks a network or system for malicious activities or policy violations.
    
    
• Benefits of IDS
  • Detects malicious activity: IDS can detect any suspicious activities and alert the system administrator before any significant damage is done.
    
    
  • Improves network performance: IDS can identify any performance issues on the network, which can be addressed to improve network performance.
    
    
  • Compliance requirements: IDS can help in meeting compliance requirements by monitoring network activity and generating reports.
    
    
  • Provides insights: IDS generates valuable insights into network traffic, which can be used to identify any weaknesses and improve network security.

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3. Firewall

• What is Firewall?
  • A firewall is a network security device that monitors incoming and outgoing network traffic and decides whether to allow or block specific traffic based on a defined set of security rules.
    
    
  • Firewalls have been a first line of defence in network security for over 25 years. They establish a barrier between secured and controlled internal networks that can be trusted and untrusted outside networks, such as the Internet.

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• Advantages of using Firewall:
  • Protection from unauthorized access
  • Prevention of malware and other threats
  • Control of network access
  • Monitoring of network activity
  • Regulation compliance
  • Network segmentation

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4. Content Filtering

• What is Content Filtering?
  • Content filtering is a process that manages or screens access to specific emails or webpages. The goal is to block content that contains harmful information.

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• Advantages of Content Filtering:
  • Boost network bandwidth.
  • Increase productivity.
  • Protects organizations from legal action.
  • Protects individuals and the organization from exploitation.

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5. Email Security

• What is Email Security
  • Email security is the practice of protecting email accounts and communications from unauthorized access, loss, or compromise.
  • Organizations can enhance their email security posture by establishing policies and using tools to protect against malicious threats such as malware, spam, and phishing attacks.
  • Cybercriminals target email because it is an easy entry point to other accounts and devices—and it relies in large part on human error.
  • All it takes is one misguided click to cause a security crisis for an entire organization.
    
    

• Advantages of Email Security:
  • Protect a company’s brand, reputation, and bottom line. Email threats can lead to devastating costs, operational disruption, and other severe consequences.
  • Enhance productivity. With a robust email security solution in place, businesses can reduce potential disruptions to operations and downtime because of a cyberattack. An effective solution helps security teams streamline response and stay ahead of increasingly sophisticated threats.
  • Ensure compliance with data protection laws such as the General Data Protection Regulation (GDPR) and help circumvent the many intangible costs of a cyberattack such as business disruption, legal fees, regulatory fines.

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