EE5653: Communication Network Security - National Cyber Security Centre - IT Computer Science Assignment Help

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1. a) Passwords are the most widely used means of authenticating human users to computer networks. However, the user ID and password only system may require a secondary method to improve the security of the system. Explain the “2-step authentication” method used in Microsoft Office 365 Outlook. 

b) The National Cyber Security Centre (UK) recently advised against a regular change of password. Explain why a regular change of password may increase the risks. 

2. a) With the help of a diagram, briefly explain the five IEEE 802.11i phases of operation for a robust security network (RSN

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