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Security Risks (Adware (Adware can be installed without the users…

- - - - Effects of a DOS attack
        
        Slow server performance
        
        Inability to access functions
        
        Loss of income
        
        Repair costs
        
        Loss of faith in affected organisation
        
        Staff working overtime
      - Types of DOS attack
        
        Bandwidth consumption
        
        Overloading a server or system with a flood of data packets and requests at the same time
        
        These cause a overload of network traffic. causing the server to be unable to send or receive data packets
        
        Resource starvation
        
        Resource starvation attacks draw on server or systems resources such as processors and memory
        
        An example of one of these attacks would be repeated requests to the same processor that causes it to repeat the same task, stopping it from performing other tasks
        
        A method of starving memory resources would be to flood a system with data
        i.e. coding a program that fills a basket of an online shop with thousands of items, to use up the available memory
        i.e. coding a program that will make thousands of requests for accounts to be made on a server. each account would add to demands on backing storage
        
        Routing
        
        Routing is sending data and packets from one system to the targeted network or system
        
        They often reroute existing data packets to a target system to take it down
        
        Routing can also employ the use of a dummy system that pretends to be legitimate so that the data that's rerouted to it can be stolen or monitored
        
        It's easier to a perform routing attack on a wireless network and on a peer to peer network
        
        A routing attack becomes a denial of service when the system or network is unable to receive data because it's been routed to a different location
        
        Domain Name Server attacks
        
        This is where attackers use the IP address of a server without permission
        
        They send an extreme excess of queries to different domain servers
        
        These queries results are then sent back to the targeted IP address
        
        The large volume of replies floods the server and effects functionality
      - Reasons for a DOS attack
        
        DOS attacks could be mounted for a variety of reasons, such as:
        
        Revenge
        
        Financial gain
        
        Political Sabotage
        
        Fun
        
        Social Issues
        
        Blackmail
        
        Issues of international security
- - - - Websites visited
      - Usernames used on websites
      - Time spent on sites
      - Multi media watched
      - The users browser settings
    - - Remember user preferences
      - Usernames for faster logins
    - - Sometimes these are used for market research
      - They can be used to gather usernames and personal details
      - These can be used for identity fraud
      - These can also be used for targeting users with personalized adds
- - - - Trojans can be hidden as a number of things, such as:
        
        A browser addon
        
        Fake anti-virus
        
        An free game