Lab Assignment 1: Vigenere Ciphe erview: You are required to implement the Vigenere Cipher using any programming lang your choice. Your program should be able to encrypt any given message written in text. Y gram should allow the user to submit a message for encryption (the message must use tex y). You should use the following message to demonstrate the encryption: "Party on the Q ur program should allow the user to input the key for performing the encryption. Please u

Lab Assignment 1: Vigenere Ciphe erview: You are required to implement the Vigenere Cipher using any programming lang your choice. Your program should be able to encrypt any given message written in text. Y gram should allow the user to submit a message for encryption (the message must use tex y). You should use the following message to demonstrate the encryption: "Party on the Q ur program should allow the user to input the key for performing the encryption. Please u

Database System Concepts

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

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Introductory: The Caesar Cipher technique is one of the earliest and simplest methods of encryption techniques. It is simply a type of substitution cipher, i.e., each letter of a given text is replaced by a letter some fixed number of positions down the alphabet. For example, with a shift of 1, A would be replaced by B, B would become C, and so on. The method is apparently named after Julius Caesar, who apparently used it to communicate with his officials. Thus, to cipher a given text we need an integer value, known as a shift which indicates the number of positions each letter of the text has been moved down. The encryption can be represented using modular arithmetic by first transforming the letters into numbers, according to the scheme, A = 0, B = 1 ,…, Z = 25. Encryption of a letter by a shift n can be described mathematically as. En(x) = (x+n) mod 26 (Encryption Phase with shift n) Write an algorithm and implement a program in C to read the data from a file (called…
In this assignment, you will create a Java program to search recursively for files in a directory.• The program must take two command line parameters. First parameter is the folder to search for. Thesecond parameter is the filename to look for, which may only be a partial name.• If incorrect number of parameters are given, your program should print an error message and show thecorrect format.• Your program must search recursively in the given directory for the files whose name contains the givenfilename. Once a match is found, your program should print the full path of the file, followed by a newline.• You can implement everything in the main class. You need define a recursive method such as:public static search(File sourceFolder, String filename)For each subfolder in sourceFolder, you recursively call the method to search.• A sample run of the program may look like this://The following command line example searches any file with “Assignment” in its name%java FuAssign7.FuAssignment7…
hello im stuck on a problem and it would be great if you could create a program that prompts the user for a message to encode,as well as an offset to encrypt it with. You will then create and use the following methods:• A validation method that takes in the message (as a string) and the offset integerentered by the user. The method should return “true” if the offset is between 0and 26 inclusively and the message contains only letters and spaces. If it failseither criteria, it should return “false”.• If the validation method returns true, a second encryption method should becalled. This method also takes in the message (as a string) and the offset integerentered by the user. It should convert the message to UPPERCASE, encryptevery letter in the message, and leave the spaces as they were. It should thenreturn the encrypted message. i attached an image of the sample output
Challenge 3: Encryption.java and Decryption.java Write an Encryption class that encrypts the contents of a binary file. Your encryption program should work like a filter, reading the contents of one file, modifying the data into a code, and then writing the coded content out to a second file. The second file will be a version of the first file, but written in a secret code. Use a simple encryption technique, such as reading one character at a time, and add 10 to the character code of each character before it is written to the second file. Come up with your own encryption method. Also write a Decryption class that reads the file produced by the Encryption program. The decryption file will use the method that you used and restore the data to its original state, and write it to a new file.
Please do in Java In many computer systems and networks,different users are granted different levels of access to different resources. In this case, you are given a int[] rights, indicating the privilege level of each user to use some system resource. You are also given a int minPermission, which is the minimum permission a user must have to use this resource. You are to return a String indicating which users can and cannot access this resource. Each character in the return value corresponds to the element of users with the same index. 'A' indicates the user is allowed access, while 'D' indicates the user is denied access. Constraints users will contain between 0 and 50 elements, inclusive. Each element of users will be between 0 and 100, inclusive. minPermission will be between 0 and 100, inclusive. Examples a) {0,1,2,3,4,5} 2 Returns: "DDAAAA" Here, the first two users don't have sufficient privileges, but the remainder do. b) {5,3,2,10,0} 20 Returns: "DDDDD"…
Correct answer will be upvoted else Multiple Downvoted. Don't submit random answer. Computer science. How about we characterize a casualty substance: a casualty has a name (not really extraordinary) that comprises just of lowercase Latin letters and an integer doubt esteem. Toward the beginning of the program the client enters a rundown of n casualty names into an information base, every doubt esteem is set to 0. Then, at that point, the client makes questions of two sorts: 1 I x — set the doubt worth of the I-th casualty to x; 2 q — given a string q observe the most extreme doubt worth of a casualty whose name is a coterminous substring of q. Just to remind you, this program doesn't eliminate individuals, it just assists with looking for the names to record in a genuine scratch pad. Consequently, the rundown of the casualties in the data set doesn't change all through the questions. What are you sitting tight for? Compose that program now! Input The main line…
java code quation using ExceptionProgramme Leader of ITMB wants to check whether the student number and GSM numberentered by the student for the programming contest is valid or not.Write a Java program to read the Student ID and GSM Number of a student. Use a methodcalled ValidityDetails () for checking the validity of details entered.If the Student ID ends with the characters ST and contains more than 6 letters or if the MobileNumber does not contain exactly 8 digits, throw a user defined exceptionInvalidDetailsException.If the details entered are valid, display the message ‘”correct details are entered!!!” otherwisedisplay “Entered invalid details!!!!”
Note: Please answer the question in C++ only: Citizens of Byteland play the game regularly. They have blocks, each of which represents some integer from 0 to 9. These are arranged together in a random fashion without having to remember that the first block is never 0. Once they form a number, they are read in reverse order. check that the number and its reverse are the same. If both are the same, the player wins. Such numbers are called palindromes. Ash happens to see this game and wants to simulate it on the computer. As a first step, it wants to take input from the user and check if the number is a palindrome and declare whether the user wins or not. Input 1 331 Output loses
IN JAVA Create a function that takes a string and returns the number of alphanumeric characters that occur more than once. Examples duplicateCount ("abcde") → 0 duplicateCount ("aabbcde") → 2 duplicateCount ("Indivisibilities") → 2 duplicateCount ("Aa") → 0 // Case sensitive
PLEASE NOTE: IT'S A TEXT BOOK EXERCISE. BOOK NAME: Fundamentals of Computer Programming with Programming Basics with C# (English) Problem: String Encryption Write a method Encrypt(char letter), which encrypts a given letter in the following way: It takes the first and the last digit from the ASCII code of the letter and concatenates them into a string, which will represent the result. In the beginning of the string, which represents the result, we will insert the symbol which matches the following condition: ASCII code of the letter + the last digit of the ASCII code of the letter. After that in the end of the string, which represents the result, you concatenate the character which matches the following condition: ASCII code of the letter - the first digit of the ASCII code of the letter. The method should return the encrypted string. Example: j → p16i ASCII code of j is 106 → First digit – 1, last digit – 6. We concatenate the first and the last digit → 16. At the beginning…
Q2: Secret Courses Dan’s recently announced that he’s teaching n top-secretcourses nextsemester. Instead of enrolling in them through ACORN, students need to email Dan to express theirinterests. These courses are numbered from 1 to n in some arbitrary order. In particular, if a student named s is interested in taking a course c, they need to send an email to Dan containing the message c s. Note that if a student is interested in taking multiple courses, they need to send multiple emails, one per course. Upon receiving a message c s, Dan looks at the list of students already enrolled in course c. If there’s already a student on the list whose name is too similar to s, Dan assumes s is the same student and ignores the message. Otherwise, he enrolls s in the course. Dan considers two names too similar if and only if they have the same length and differin at most one letter(note that“a” and “A” are considered the same letter). For example, “Josh” and “Josh” are too similar. “Sam” and “CaM”…
Question 3: Write the bin2Dec(String binaryString) method to convert a binary string into a decimal number (your method should return an integer). Implement the bin2Dec method to throw a NumberFormatException if the string is not a binary string. Test your method in a program that prompts the user to input a binary string and uses your bin2Dec method to print out the decimal equivalent of that string. If the method throws an error, have your program catch it and print "Not a binary string." before terminating.