Computer Science

Computer Science

1. System Threats

   • Data Interception
     • Effects
       • Can be used to gain access to sensitive information
     • Protection Against
       • Data Encryption stops the data being of use to anyone without the decryption key
     • What is it?
       • The Interception of Data Packets sent between computers and servers
   • Phishing
     • Protection Against
       • Staff Training
     • What is it?
       • An E-Mail or Website which is a fake of a well known, respected website which will ask for sensitive data such as usernames and passwords
     • Effects
       • People can use this data typically to take money or gain access to sensitive data eg Business plans
   • Malware
     • What is it?
       • A Malicious Software which attack the Computer System eg: Spyware, Ransomware and Scareware
     • Effects
       • Spyware: Allows someone to watch what you're doing used to collect sensitive data such as bank usernames and passwords or card numbers
       • Ransomware: Deny's Access to files or will run a program if ransom is not paid within a time limit
       • Scareware: Creates popups scaring users into downloading a useless or dangerous software such as false Anti-Virus Software which contain viruses
     • Protection Against
       • Update Anti-Virus Software frequently
       • Make sure links, websites and downloads are safe before useing
   • Brute Force Attack
     • What is it?
       • Uses every Combination of Letters, Words and Symbols till it cracks your password
     • Effects
       • Gains access to accounts or online password protected data bases
     • Protection Against
       • A reCAPTCHA test is a very simple task that only a person could pass which stops computerised BFA's it also makes it slow and tedious for a person you should also make sure your password is complex making it harder to break in
   • Denial of Service
     • What is it?
       • ?
     • Protection Against
       • DDoS Protection Software
     • Effects
       • Denies Access to Server or Computer stopping internet use
   • SQL Injection
     • Protection Against
       • ?
     • What is it
       • A piece of SQL code entered into a data input point used to gain access to Data Bases
     • Effects
       • Allows Editing of Data Bases through data input points such as usernames and passwords

2. 1.1.1 Structure and Function of the CPU

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