previous questions attached on the images, answer required in c++ 1.4.Write a back-end class called AdvancedAPM11A1Encryptor and save it in a file called AdvancedAPM11A1Encryptor.cpp. This class must inherit the functionality of theAPM11A1Encryptor class and add functionality that will enable us to make use of the ExclusiveOR encryption procedure. This class must have the following structure: Inherited Data MembersData Type: intName: int keyDescription: This member will store the key that will be used during the encryption processPublic MethodsReturn Type:charMethod Signature : encryptACharacter(char character)Description:This method must encrypt the received character by using the key class member and the ExclusiveOR encryption technique.Inherited MethodsMethod Signature:encryptPage(Page page), setKey(int key 1.5.Write a main program and save it in a file called Run.cpp. In this program you must read a text file that contains sentences into a Page object, encrypt the content using the APM11A1Encryptor class and then write the Page to a new text file called encrypt1.txt by using the PageManager class. 1.6.Read the content of the same source text file into a second Page object, encrypt the content by making use of the AdvancedAPM11A1Encryptor class and then write the Page to a text file called encrypt2.txt by using the PageManager class.During both encryption processes make use of the same key value. After executing your Run.cpp file, open the newly created text files and compare their content. If your encryption worked, the content of the two files should differ. Question 1LaiBackgroundYou are required to write program that will read a fille, encrypt the content of the file, and thencreate a new file that contains the encrypted content.Your program will make use of the following classes:Page - This class will be used to represent the content of the file that was read.PageManager - This class will be used to read page content from and to a fille.APM11A1 Encryptor-This class will be used to encrypt the content of a file using the Caesar-Ciphermethod.AdvancedAPM11A1Encryptor-This class will be used to encrypt the content of a file using theExclusive-OR method.Caesar CipherCaesar was a Roman military and political leader during 100BC to 44BC. In order to make thecommunication channels secure during war, he invented an encryption technique called the CaesarCipher. The cipher requires a sentence and a key to function properly. Each character in the sentencewas then shifted according to the value of the key. Computer programmers adapted the cipher so thatit can be used in programs. Each alphabet letter is assigned a value. This value is determined by theposition of the letter in the ASCII table. E.g. A=65, B-66, C-67, D-68 .... X=88, Y=89, Z-90. The key isdetermined by the person who wants to encrypt the sentence. If you select a key=1, and you have asentence="TPG11BT is fun", it will encrypt to: UQH22CU!jt! gvo.Exclusive OR EncryptionThe exclusive-OR method requires a key and a sentence to function properly. The ACII value of eachcharacter in the sentence is exclusive-ORed with the key. E.g. If you select a key-1, and you have asentence="TPG11BT is fun", it will encrypt to: UQFOCU!hr!gto.Below is an example of how to exclusive-OR the charactercharx = 'T';chary=x^1;NB! Please note that you may not add any additional methods or members to the classes ofquestion 1.1-1.4.1.1. Write a back-end class called Page and save it in a file called Page.cpp. This class must have theDataтуреstringon ExerciintcSentences[]SentenceCounterDescriptionThis member will store the sentences on the page.You may assume that a record will never have morethan 34 sentences.This member will store the number of sentences onthe page. Public MethodsReturnTypevoidstringintvoidMethod SignaturePage()Public MethodsReturnTypePageintaddSentence(stringsentence)getSentenceAt(int index)get Number Of Sentences()1.2. Write a back-end class called PageManager and save it in aclass must have the following structure:PagevoidMethod SignatureloadPageFromFile(stringfileName)Protected MembersDataName3writePageToFile(string fileName,Page page)Public MethodsReturn Method SignatureTypecharkey1.3. Write a back-end class called APM11A1Encryptor and save it in a file calledAPM11A1Encryptor.cpp. This class must have the following structure:encryptACharacter(charDescriptioncharacter)A default constructor that will initialiseSentenceCounter to zero.encryptPage(Page page)This method will place add a sentence to the Page.You must make use of the cSentences[] array.This method will retrieve a sentence.This method will return the number of sentencesthere are on the Page.setKey(int key)resThis method must read the content of thespecified file into a Page object and returnthis Page.DescriptionThis method must write the content of aPage object into the specified file.This member will store the key that will be used duringthe encryption process. (You may NOT change the nameof this member)DescriptionThis method must encrypt the received characterby using the key class member and the CaesarCipher encryption technique.This method will encrypt the content of thereceived page parameter by making use of theencryptACharacter() method.This method will set the value of the key datamember. (You may NOT change the name of theinput parameter)

C++ is a high-level, general-purpose programming language and is now widely used in a variety of…

previous questions attached on the images, answer required in c++ 1.4.Write a back-end class called AdvancedAPM11A1Encryptor and save it in a file called AdvancedAPM11A1Encryptor.cpp. This class must inherit the functionality of the APM11A1Encryptor class and add functionality that will enable us to make use of the ExclusiveOR encryption procedure. This class must have the following structure: Inherited Data Members Data Type: int Name: int key Description: This member will store the key that will be used during the encryption process Public Methods Return Type:char Method Signature : encryptACharacter(char character) Description:This method must encrypt the received character by using the key class member and the ExclusiveOR encryption technique. Inherited Methods Method Signature: encryptPage(Page page), setKey(int key 1.5. Write a main program and save it in a file called Run.cpp. In this program you must read a text file that contains sentences into a Page object, encrypt the content using the APM11A1Encryptor class and then write the Page to a new text file called encrypt1.txt by using the PageManager class. 1.6. Read the content of the same source text file into a second Page object, encrypt the content by making use of the AdvancedAPM11A1Encryptor class and then write the Page to a text file called encrypt2.txt by using the PageManager class. During both encryption processes make use of the same key value. After executing your Run.cpp file, open the newly created text files and compare their content. If your encryption worked, the content of the two files should differ.

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE