Computer security is a crucial aspect of protecting our digital lives and information. It involves implementing measures to safeguard our computers, networks, and data from unauthorized access, attacks, and malicious activities. Three fundamental components of computer security are antivirus software, firewalls, and password security.

Antivirus software plays a vital role in defending against various types of malware, including viruses, worms, Trojans, and ransomware. It scans files and programs, detects potential threats, and removes or quarantines them. Regularly updating antivirus software ensures it remains effective against the latest threats.

Firewalls act as a barrier between a computer or network and the outside world, monitoring and controlling incoming and outgoing network traffic. They examine data packets, filter out potentially harmful or unauthorized ones, and prevent unauthorized access to a system. Firewalls are essential for protecting against hacking attempts and unauthorized intrusions.

Password security is another critical aspect of computer security. Strong, unique passwords are essential for protecting sensitive information. It is recommended to use a combination of uppercase and lowercase letters, numbers, and special characters. Regularly changing passwords and avoiding the reuse of passwords across multiple accounts further enhances security.

Additionally, it is important to practice good password management, such as using password managers to securely store and generate complex passwords. Two-factor authentication (2FA) adds an extra layer of security by requiring a second verification step, such as a unique code sent to a mobile device, along with the password.

A comprehensive approach to computer security involves a combination of antivirus software, firewalls, and strong password practices. Staying vigilant, keeping software up to date, and being cautious of suspicious emails, links, and downloads are also crucial for maintaining a secure computing environment.

Windows Updates

Microsoft regularly releases security fixes for Windows.
Without these fixes, your PC is vulnerable to attack.

Keeping Windows up to date is very easy. Follow this link and follow the instructions.

http://windowsupdate.microsoft.com

You should at least install all of the critical patches necessary.

You can also configure Windows to automatically check for, download and install these updates for you as necessary.

Image shows a blue screen with symbols and the word 'compliance'

Anti Virus

Any device, whether a computer, phone, or tablet, that connects to the internet can be affected by viruses. Without up to date antivirus software your PC will become infected, virus removal is complicated and time consuming!

Windows Defender, the free antivirus software built into Windows, is now as effective as anything you can purchase. Hackers are more likely to take advantage of poor passwords and a lack of two-factor authentication. You can read more about password security here.

Privacy-and-security
While it isn’t true that Apple devices can’t get viruses; they have had antivirus protection built into their operating systems from the early days.

Firewall

A firewall is a network security device that acts as a barrier between your computer network and the internet. Its main purpose is to monitor and control incoming and outgoing network traffic based on predetermined security rules.

Firewalls can be either hardware-based or software-based. Hardware firewalls are physical devices that are typically installed between your network and the internet. They provide a dedicated layer of protection for your entire network. On the other hand, software firewalls are installed on individual devices, such as computers or servers, and provide protection at the device level.

Firewalls work by inspecting the data packets that are being transmitted over the network. They examine the source and destination addresses, ports, protocols, and other characteristics of the packets to determine whether they should be allowed or blocked. Firewalls use a set of predefined rules or policies to make these decisions. For example, they may block certain ports that are commonly used for malicious activities or restrict access to specific websites or services.

By implementing a firewall, you can enhance the security of your network by preventing unauthorized access, protecting against malware and other malicious threats, and controlling the flow of network traffic. It acts as a barrier, allowing only authorized and safe connections to pass through while blocking or alerting you about potentially harmful or suspicious activities.

How to turn on your Windows Firewall

start

STEP 1

Go to START

STEP 2

Choose SETTINGS

Privacy

STEP 3

Choose PRIVACY & SECURITY

STEP 4

Go to WINDOWS SECURITY

Privacy-and-security

Here you can check your current settings. Make sure your firewall is turned on.

Apple have a guide here on turning on your firewall on your Mac.

Pop Up Blocking

Pop-Ups are those annoying windows which appear on your PC screen advertising things you don’t want and don’t need.

These are time consuming to remove, and use up your internet bandwidth.

To block the pop-ups visit:

Privacy and security > site settings in Google Chrome

Choose Safari > Settings, then click Websites

For Firefox select the Privacy & Security panel.

In Opera go to Settings; Toggle on Ad blocking, Cryptocurrency mining protection, and Block pop-ups

You can also choose to allow pop-ups from a specific site:

In Google Chrome go to the web page where the pop-ups are blocked. In the address bar click pop-up blocked. Click the link for the pop-up you would like to see. To always see pop-ups from that specific site select Always allow pop-ups and redirects from {site name}

On Safari choose settings and then click Websites. Scroll down and select Pop-up Windows, choose Allow, Block or Notify.

For Firefox choose Privacy & Security, to allow pop-ups for a specific site click the Exceptions box and enter the site address.

Spyware Removal

Spyware is a type of malicious software that is designed to secretly collect information about a user’s activities on a computer or mobile device without their knowledge or consent. It can be installed on a device through various methods, such as downloading infected software, clicking on malicious links, or opening infected email attachments.

Once installed, spyware operates in the background and can monitor and record a user’s keystrokes, web browsing habits, emails, instant messages, and other activities. It can also capture screenshots, track online purchases, steal login credentials, and gather personal information like passwords and credit card details. 

The collected information is usually sent to a remote server controlled by the attacker, who can then use it for various purposes, such as identity theft, financial fraud, or selling the data to third parties. Spyware can also slow down computer performance, cause system crashes, and display unwanted pop-up ads.

To protect against spyware, it is important to have reliable antivirus and anti-spyware software installed on your device. Regularly updating your operating system and software, being cautious while downloading files or clicking on links, and avoiding suspicious websites and email attachments can also help prevent spyware infections.

Most computers that connect to the internet have some spyware on them! Your anti-virus protection will protect you from spyware but for added peace of mind, you can use Spybot Search & Destroy. 

http://www.safer-networking.org/en/spybotsd/index.html

Wireless LAN

1. Mobility: With a wireless LAN, you can connect to the network and access resources from anywhere within the network’s coverage area. This allows for greater flexibility and mobility, enabling users to work from different locations within an office or even connect remotely.

2. Convenience: Wireless LANs eliminate the need for physical cables and connections, making it easier to set up and manage your network infrastructure. This can save time, effort, and costs associated with running cables and maintaining physical connections.

3. Scalability: Wireless LANs are highly scalable, allowing you to easily expand your network by adding more access points or devices as needed. This flexibility makes wireless LANs suitable for homes and small and large organizations, accommodating growth and changes in network requirements.

4. Cost-effectiveness: While there may be an initial investment in setting up a wireless LAN, it can save costs in the long run. Wireless networks eliminate the need for extensive cabling and associated installation costs. Additionally, wireless devices are often more affordable and easier to deploy than wired counterparts.
5. Collaboration and productivity: Wireless LANs enable seamless collaboration among team members by providing instant connectivity to shared resources, such as files, printers, and servers. This promotes productivity and efficiency, allowing for real-time collaboration and quick access to information.

6. Guest access: A wireless LAN allows you to set up guest networks, providing secure and controlled access for visitors or clients without compromising the security of your main network. This ensures that guests can connect to the internet or specific resources while keeping your internal network separate and protected.

7. Flexibility and future-proofing: As technology continues to evolve, wireless LANs offer the flexibility to adapt and integrate new devices and technologies. Whether it’s supporting Internet of Things (IoT) devices, smart home technology, or future advancements, a wireless LAN provides the foundation for connectivity.
In summary, a wireless LAN offers mobility, convenience, scalability, cost-effectiveness, collaboration, guest access, and future-proofing benefits. It can enhance productivity, simplify network management, and provide a flexible and efficient network infrastructure for your organization.

WPA stands for Wi-Fi Protected Access. It is a security protocol used to protect wireless networks. WPA provides stronger security than its predecessor, WEP (Wired Equivalent Privacy), by using encryption algorithms and dynamic encryption keys. WPA is commonly used to secure Wi-Fi networks and prevent unauthorized access or eavesdropping on network traffic.

Password Security

lockData breaches and identity theft are becoming more common. Ensuring you have a secure, strong password and two-factor authentication is the first step in preventing cybercriminals from gaining access to your information.

The essentials of password security are

Passwords must be complex. Passwords should be 8 to 12 characters long. Use a mix of letters, numbers, and symbols. Vary upper case and lower case letters.

Passwords should not be reused. Don’t use the same password on multiple sites. It is also recommended that you change your password every 90 days.

Don’t use real words within a password, they are much easier for hackers to breach.

Check to see whether or not your passwords have been previously stolen. Google and Firefox offer tools to see if your emails and passwords have been compromised in a data breach.

Don’t use your bank PIN for your phone!

Password Safe

Since it is impossible to remember many complex passwords, you will need a password safe.

Keepass is a widely used secure password safe, which is free to use.

Setup

Once running, you will need to create a new file to store passwords in, to do this click ‘file’ … ‘new’ and select a suitable filename and folder to store it in.

Then you will be asked to set up a Master Password. You must select a complex but memorable password. If you forget this password there is no way to retrieve any data you store in Keepass.

Download

To download the latest version of Keepass go to https://keepass.info/download.html  and download the latest version.

At the time of writing, the latest version in Keepass 2.53

Download the .exe file.

Run

Once setup, you can enter your passwords in Keepass, add entries by clicking on the gold key icon and fill in the fields you need.

Remember to save changes using the disk icon.

Install

Once you have downloaded the .exe file, run it to install the software.

Follow the usual installation instructions, once installed the Keepass program will start.

Use

To access your passwords, run Keepass, and it will automatically open the last password-safe file you used, you will then need to enter your master password.

Look for the password you need, and copy it from Keepass using copy, and paste it where you need it.

Backup

In order to not lose your passwords in the event of your PC breaking, you will need to back up the file the passwords are stored in. This file is the one you chose during setup, and ends “.kbdx”.
The easiest way to backup this file is to email it to yourself, on an email system such as Gmail, leaving a copy of the file on the Gmail server.
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