Secure protocol, Assume that Alice shares a secret s with

Secure protocol

Assignment Help Basic Computer Science

Reference no: EM13246580

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?

Required minimum-1 page

Reference no: EM13246580

Questions Cloud

Determine the depletion capacitance per unit area : For a p+-n silicon junction, Na= 1 × 1017 cm-3 in the p-side and Nd= 1 × 1015 cm-3 in the n-side. Determine the depletion capacitance per unit area of cm2 at -4V.

Define the pentose phosphate pathway : Explain The pentose phosphate pathway is another possible direction for G-6-P. What are the two major products of the pentose phosphate pathway

Write a sum-of-products expression for the 8-1 multiplexer : The question considers the design of a 8x1 multiplexer using gates. Assume the data inputs are I0,...,I7 and the select inputs are S2, S1 and S0. (a) Write a sum-of-products expression for the 8x1 multiplexer.

Determine the length of wire : A piece of Nichrome wire has a radius of 5.50 10-4 m. It is used in a laboratory to make a heater that uses 3.00 102 W of power, estimate the necessary length of wire

Secure protocol : Assume that Alice shares a secret s with her company's server computer.

State ag write a balanced equation : for a particular redox reaction MnO2 is oxidized to MnO4- and Ag+ is reduced to Ag write a balanced equation

Explain what is the mass expressed in kilograms : If 842 pounds of Moon samples have been collected from lunar landings, what is the mass expressed in kilograms? (Given: 1 kilogram= 2.20 pounds).

Find force of friction between losing player feet and grass : A brave but inadequate rugby player is being pushed backward by an opposing player who is exerting a force of 800 N on him, What is the force of friction between the losing player's feet and the grass

Explain differentiate between pentanal and 3-pentanone : Which of the following tests could differentiate between pentanal and 3-pentanone, also what would occur.

User Account

All Pages

Secure protocol

Reference no: EM13246580

Reference no: EM13246580

Questions Cloud

Reviews

Write a Review

Basic Computer Science Questions & Answers

Identifies the cost of computer

Input devices

Cores on computer systems

Prepare an annual budget in an excel spreadsheet

Write a research paper in relation to a software design

Describe the forest, domain, ou, and trust configuration

Construct a truth table for the boolean expression

Evaluate the cost of materials

The marie simulator

What is the main advantage of using master pages

Describe the three fundamental models of distributed systems

Distinguish between caching and buffering

Assured A++ Grade

Academics

Major Subjects

Majors

Get In Touch

TERMS & POLICIES

HELP & SUPPORT