Ask Question, Ask an Expert

+61-413 786 465

info@mywordsolution.com

Ask Computer Network & Security Expert

Computer Science


Home >> Computer Network & Security

Assume that Alice shares a secret s with her company's server computer. When Alice is on a trip, she tries to store an important message in the CEO's account directory. This message needn't be encrypted since confidentiality is not important here, but the CEO needs to be guaranteed that the message really is from someone who knows the secret s (e.g. Alice) when the CEO opens his/her computer the next day. A naïve protocol to achieve this may look like this: 
Alice-->Server: "This is Alice, I have an important message to forward to the CEO"
Server-->Alice: "OK, please encrypt R" (where R is a random nonce)
Alice-->Server: "Es(R)" (that is, R is encrypted with the secret s)
Server-->Alice: "Please send the message"
Alice-->Server: "The CEO needs to attend a meeting in Liverpool on May 1, 2006"
The server stores this message in the CEO's directory
Is this protocol secure? If not, how do you feel it could be modified to make it so?

Computer Network & Security, Computer Science

  • Category:- Computer Network & Security
  • Reference No.:- M9117637

Have any Question?


Related Questions in Computer Network & Security

Fiona told her friend that she is very fortunate as the

Fiona told her friend that she is very fortunate as the slow-down in the economy has not decreased sales in her grocery store by much compared to sales of new cars in his car dealership. Explain what Fiona meant using th ...

You need to prepare packet tracer fileattached pdf contains

You need to prepare packet tracer file attached pdf contains topology and required configurations and assigned ip address. In packet tacer file you need to include banner, router and switches. 1. VLSM Design a) As first ...

Topic is impacts of data breaches the report will divide in

Topic is "Impacts of data breaches". the report will divide in to 5 section which is : "" 1-Abstract: comprehensive overview of the report in 150 to 200 words. 2- Introduction: Describe the topic and its issue in 250 to ...

Lab activity investigate system backup and restore

Lab Activity: Investigate System Backup and Restore Tools Purpose: Assess and Document Tools to Backup and Restore the System Hard Drive for a Windows 8.1 Workstation. - Assess and document the use of a system backup too ...

Final project incident response exercise amp reportyour

Final Project: Incident Response Exercise & Report Your Task You have been assigned to work incident clean-up as part of the Sifers-Grayson Blue Team. Your task is to assist in analyzing and documenting the incident desc ...

What are three ways that even every forecast model should

What are three ways that even every forecast model should be evaluated to obtain the best forecast result.

Metasoft ltd is a software development company which works

MetaSoft Ltd is a software development company which works across Australia and New Zealand. The company is considering the following strategic proposal: - They plan to close down the Melbourne data centre rather than up ...

Data model development and implementationpurpose of the

Data model development and implementation Purpose of the assessment The purpose of this assignment is to develop data models and map Database System into a standard development environment to gain understanding of data m ...

Wireless networks and security assignment - design and

Wireless Networks and Security Assignment - Design and implementation of secure enterprise wireless network Purpose of the assessment - The purpose of this assignment is to design and implement a secure enterprise wirele ...

In a short paragraph explain the transmission of data for a

In a short paragraph, explain the transmission of data for a TCP connection between a client computer and a web server to request a web page. Assume that the server responds with a web page that fits in one packet. Assum ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Why might a bank avoid the use of interest rate swaps even

Why might a bank avoid the use of interest rate swaps, even when the institution is exposed to significant interest rate

Describe the difference between zero coupon bonds and

Describe the difference between zero coupon bonds and coupon bonds. Under what conditions will a coupon bond sell at a p

Compute the present value of an annuity of 880 per year

Compute the present value of an annuity of $ 880 per year for 16 years, given a discount rate of 6 percent per annum. As

Compute the present value of an 1150 payment made in ten

Compute the present value of an $1,150 payment made in ten years when the discount rate is 12 percent. (Do not round int

Compute the present value of an annuity of 699 per year

Compute the present value of an annuity of $ 699 per year for 19 years, given a discount rate of 6 percent per annum. As

Follow Us

© Copyright 2013-14 mywordsolution.com All rights reserved