Authenticating Human users to Computer Networks - IT Computer Science Assignment Help

Asignment Task :

Scenario
Passwords are the most widely used means of authenticating human users to computer networks. There are various rules on the use of passwords that can be applied to mitigate the risk posed by dictionary attacks on passwords.  Explain a dictionary attack and describe two of the rules used to mitigate the risk from dictionary attacks applied in the Brunel University London network.  
b) The National Cyber Security Centre (UK) recently advised against a regular change of password.  Discuss why a regular change of password may increase the risk posed by dictionary attacks on passwords.  

2.a) Good security engineering has four attributes. State each of the four attributes together with a description of what each attribute refers to. 

b) Describe phishing.    

c) Discuss how the risk posed by phishing can be mitigated.    

3. a) State the two types of base station in the 3GPP network, the  technology on which each type is based, and the controlling unit to which each type is connected. 
 
b) Access security terminates in difference parts of the 3GPP core network for Universal Terrestrial Access Network (UTRAN) and GSM/EDGE Radio Access Network (GERAN) services. Explain the reason for this mentioning where in each case the access security terminates and its significance. 
 
c) In the context of telecommunications explain what Signaling System No. 7 (SS7) refers to. Outline the major security vulnerabilities that the use of SS7 gives rise to. 
 
4. a) Explain the secure use of Transport Layer Security/Secure Sockets Layer (TLS/SSL) in a Wi-Fi hotspot. 
  
b) Discuss the security risks the KRACK (key reinstallation attack) attack on WPA2 exposes users of Wi-Fi to. Explain how industry participants in the Wi-Fi value chain have sought to address the KRACK attack and the measures individual users should take to protect themselves from the attack.                                                                                                                     

5.a)Review the limitations of Virtual Private Networks (VPNs).

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