منتديات طلاب الجامعة العربية المفتوحة
اهلا بك في منتديات طلاب الجامعة العربية المفتوحة

منتديات طلاب الجامعة العربية المفتوحة

كورسات - ملخصات - حل واجبات الجامعة العربية المفتوحة واتس اب 00966596368034 ايميل : aou_sheets@yahoo.com واتس اب 00966596368034
 
الرئيسيةالرئيسية  اليوميةاليومية  س .و .جس .و .ج  بحـثبحـث  التسجيلالتسجيل  دخولدخول  

شاطر | 
 

 حل واجب t215b fall 2017-2018

استعرض الموضوع السابق استعرض الموضوع التالي اذهب الى الأسفل 
كاتب الموضوعرسالة
aou.tma2016



عدد المساهمات : 68
نقاط : 166
تاريخ التسجيل : 15/11/2016

بطاقة الشخصية
حلول واجبات الجامعة العربية المفتوحة:

مُساهمةموضوع: حل واجب t215b fall 2017-2018   السبت أكتوبر 21, 2017 10:09 pm


T215B: Communicationand information technologies (II)
Fall 2017/2018
______________________________________________________________________________
Tutor-Marked Assignment
_____________________________________________________________________________
Cut-off date:
_____________________________________________________________________________
Total Marks: 40
TMA Contents
Question 1 (20 marks)
Question 2 (20 marks)

Plagiarism Warning:
As per AOU rules and regulations, all students are required to submit their own TMA work and avoid plagiarism. The AOU has implemented sophisticated techniques for plagiarism detection. You must provide all references in case you use and quote another person's work in your TMA. You will be penalized for any act of plagiarism as per the AOU's rules and regulations.
Declaration of No Plagiarism by Student (to be signed and submitted by student with TMA work):
I hereby declare that this submitted TMA work is a result of my own efforts and I have not plagiarized any other person's work. I have provided all references of information that I have used and quoted in my TMA work.
Name of Student:………………………………..
Signature:…………………………………………...
Date:……………………………………………………

Question 1:Data Encryption Standard (DES)
This question carries 20 of the marks for this assignment.

The Data Encryption Standard (DES) is an algorithm for the encryption of electronic data, which you studied briefly in T215B. This task aims to assist you in learning more about the DES. The body of your report should answer the following questions:
• Define DES? (1 mark)
• What is the history of DES? (1 mark)
• Describe the key generation of the Simplified DES algorithm? It is preferable to answer it as a list of points.(4 marks)
• Describe Simplified DES algorithm? It is preferable to answer it as a list of points.(4 marks)
• What are the advantages and disadvantages of DES – at least 2 advantages And 2 disadvantages? (2 marks)
• Is DES secure mechanism to protect electronic data at the present time, justify your answer? (1 mark)
Report Writing:
Please adhere to the following guidelines for writing your report:

Your report should be between 700 and 800 words in length. Under-length and over-length reports will be penalized.
Your report should include at least two figures and/or tables. Do not forget to include a caption for each figure/table and to use cross-referencing. (1 Mark)
Ensure that your report meets the objectives, has an appropriate structure and style, and that its technical level is appropriate for the audience, purpose and medium. (1 mark)
You MUST include at least 5 good quality references and ensure that they are cited within the text of your solutions making use ofciting/referencing style you have learned in session 8 of T215B. (5 marks)
You are advised to remind yourself of the issues concerning plagiarism.


Question 2:Double Encryption

This question carries 20 of the marks for this assignment.

A bank manager wants to send a secure message to the head of personal department. He doesn’t want any employee to read it. He decided to apply double encryption scheme to achieve this task. This double encryption scheme consists of two-stage cascaded encryption processes as shown in the figure below:


Key Keyword

Plain text intermediate code Cipher text
P code 1 code 1 C

Knowing that:
- The encryption key for Caesar cipher is 5.
- The keyword for Vigenère cipher is: “module”.
- The original message is: “promotion is approved”
What will be the final encrypted message? Show your work in details including the two stages encryption processes in the form of a composite table.
Note:Table below help you to find the code equivalent to each letter.



***************************
End of Questions


_________________


TECHNOLOGY SHARING CENTER نرسم لك طريق نجاحك







whatsapp:: 00966596368034


Facebook: https://goo.gl/UCmJmz


Instagram: aoutmaa


Twitter: @aoutmaa





حلول – حل  واجبات جميع مواد الجامعة العربية المفتوحة لجميع الاقسام و التخصصات




مع نخبة من افضل المتخصصين
نقدم لكم حلول نموذجية نضمن لكم عدم التشابه و الحصول على درجات مرتفعة باذن الله
تميزنا عبر الاعوام الساابقة وحصل طلابنا على اعلى الدرجات
الرجوع الى أعلى الصفحة اذهب الى الأسفل
 
حل واجب t215b fall 2017-2018
استعرض الموضوع السابق استعرض الموضوع التالي الرجوع الى أعلى الصفحة 
صفحة 1 من اصل 1
 مواضيع مماثلة
-
» خطط التحسن ونظم المتابعة لجميع المجالات2016/2017
» تشكيل لجنة لإعداد ملف لاستضافة المغرب لأمم إفريقيا عام 2015 أو 2017

صلاحيات هذا المنتدى:لاتستطيع الرد على المواضيع في هذا المنتدى
منتديات طلاب الجامعة العربية المفتوحة  :: منتدى طلاب تقنية المعلومات والحاسوب :: T215B-
انتقل الى: