por James Lin Yang 1 ano atrás
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5 Ways to prevent Viruses
Stay away from Unsecured WiFi Stay with trusted and secure WiFi. Unsecured WiFi can be easily accessed by any hacker.
Think before you Click Viruses can spread through e-mails, links etc. so beware of things sent to you that may seem suspicious
Choose a strong password Make a complex password that's not easy to guess and includes numbers, capital letters, and special characters.
Use a Firewall prevent unauthorized access into or out of a computer network
Install an AntiVirus detects and remove viruses and other kinds of malicious software from your computer or laptop
Computer Virus Timeline
The HeartBleed Virus -Appeared in 2014 -Allowed anyone on the internet to read the memory of systems using the vulnerable OpenSSL software.
The MYDOOM Virus -Appeared in 2004 -Considered one of the most dangerous viruses -Created "Zombies" out of computers which hackers could then access and create DDOS attacks. -Caused more than $38 Billion worth of damage.
The CODE RED Virus -Appeared in 2001 -Developed by Marc Maiffret and Ryan Permeh -Was a worm -Purpose was to exploit a vulnerability in Microsoft's Internet Information Server -Manipulated computer protocols and spread in just a few hours
The ILOVEYOU Virus -Appeared in 2000 -Is a virus and also a worm. -Created by Onel De Guzman -Was created to steal passwords for internet access since he couldn't pay for it due to College. -Was spread through e-mails. -Negatively affected around 45 million users.
The BRAIN Virus -Debated as the first PC Virus. -Appeared in 1986 -Developed by brothers, Basit and Amjad Farooq Alvi. -Infected 5.2" floppy disks -They were tired of customers making illegal copies of their software from their computer store so they developed Brain, which replaced the boot sector of a floppy disk with a virus.
The ANIMAL Virus -The first Trojan Horse virus -Appeared in 1975 -Developed by John Walker -Used a try to guess the animal game in 20 questions to copy information and carry out actions without user approval -However had no malicious intent
The RABBIT Virus -Appeared in 1974 -Purpose was to get on a computer and make copies of itself until the machine crashed -Did have malicious intent
The Creeper Program -Appeared in 1971 -Considered the first computer virus -Developed by Bob Thomas -Designed as a security test to see if a self-replicating program was possible -Had no malicious intent
As noted by Discovery, the Creeper program, often regarded as the first virus, was created in 1971 by Bob Thomas of BBN. Creeper was actually designed as a security test to see if a self-replicating program was possible. It was—sort of. With each new hard drive infected, Creeper would try to remove itself from the previous host. Creeper had no malicious intent and only displayed a simple message: "I'M THE CREEPER. CATCH ME IF YOU CAN!"
5 General Categories of Malware
Trojan Horse Program or file that says it's one thing (like a video or game) and is really something else (like a virus or spyware). (e.g. RootKit)
Worm Like a virus except it doesn't need to change existing programs to work. (e.g. Morris Worm)
Spyware/Adware Collects information about the user and changes web searches or traffic to other sites. (e.g. Fireball Adware)
Backdoor Any way around a security measure without authorization. (e.g. Backdoor Trojan Horse)
Viruses Spreads by copying itself. Can affect any type of computer functionality by changing existing programs. (e.g. ILOVEYOU virus)
The 3 Categories of Development Software
Integrated Development Environment (IDE)
An interface, usually graphical, that combines an editor window used to write code, an interpreter and a compiler into one package. An IDE also allows you to "debug" or execute a program one line at a time while giving access to all of the program's memory. This is done in order to find problems within the code.
Interpreter
Executes commands. In fact, an interpreter takes a program one line at a time and executes each line as it arrives.
Compiler
A program that is used to translate code from one language (say C, Java or Python) into a language the computer itself understands . The result is usually a file that can be executed or run on the target system. A compiler does not execute commands.
The 3 Categories of System Application
BIOS
Program responsible for Basic Input Output of a computer. (e.g. ASUS)
Device Drivers
Small programs that provide an Application Program Interface (API) which determines how other programs can interact with hardware.(e.g. Printers)
Operating System
Is a program that, after being initially loaded into the computer by a boot program, manages all of the other application programs in a computer.(e.g. Windows)
The 4 Categories of Application Software
Education/ Reference
Thesaurus Can be paired with a dictionary to find the definition, synonym, and antonyms of words.
Coding Can be used to become familiar with programming language such as JavaScript and Python.
Encylopedias Used to find information on various different types of topics and subjects
Math Can be used to help solve and graph math problems and equations
Business
Customer Service Allows for customers to contact companies for aid or complaints (e.g. Intercom)
Human Resources lets you manage all the employee information under one roof (e.g. Employment Information Systems)
Accounting lets users create and send invoices, upload receipts, track miles and view accounting reports (e.g. QuickBooks)
Finances Applications can help you lets you track your cash flow
Entertainment
Streaming Services continuous transmission of audio or video files from a server to a viewer (e.g. Netflix)
Video Players An application used to playback videos (e.g. VLC)
Music Players An application used for playing/listening to audio files (e.g. Spotify)
Video Games Electronic games that can be played with the use of an input such as a controller(e.g.Fortnite)
Productivity
Photo Editors used to change and alter pictures/photos in many different ways (e.g. Photoshop)
Database a organized collection of ordered data, usually kept electronically in a computer system.(e.g. Excel)
Spreadsheets used to store, organize and easily access information and data (e.g. Google Sheets)
Word Processors a type of software application used for writing, editing, and printing documents. (e.g. Google Docs)
