Assume that the following DFD is used for Blood Bank Management System. Identify the following DFD is Logical DFD or Physical DFD. Write any 4 reasons to justify your identification. (5 marks)
Q: What do you think of when you hear the word "phishing"?
A: The perpetrators of a phishing scam often adopt the personae of a trustworthy organization and seek…
Q: Use the modified Caesar cipher described in the assignment instructions to encrypt the following:…
A: C code to encrypt the plaintext " ELECTRONIC " using modified Caesar cipher
Q: 5. Using a Shift Cipher, the plaintext ’EULER’ gives ’LBSLY’. What is the value of k?
A: Each letter in the plaintext is moved a specific number of positions down the alphabet in a shift…
Q: Obtain the cipher text for the plain text "mosque" using playfair cipher. All steps should be…
A: Here we have given cipher text for the plain text "mosque" using playfair cipher. you find the…
Q: Use the modified Caesar cipher described in the assignment instructions to encrypt the following:…
A: Below i have given answer:
Q: Question # 1: Use the Multiplicative Cipher method to encrypt the following plaintext: We will…
A: formula to encrypt text using multiplicative cipher is:- first write ranking of each letter…
Q: Compare the given types of cryptanalytic attacks and identify the one which are the hardest for a…
A: In Known-plaintext attack, the plaintext of some part of the ciphertext is known by the attacker ,…
Q: It's not possible to have a many to many solution as I said in my last message!!
A: Explanation: Many to many, not a correct relation between part and supplier. Because every supplier…
Q: Find the plaintext using Vernam Cipher if the cipher text is “JEURQWEP” and the key is “rainyday”.
A: Vernam Cipher uses key and text of the same_ length that is the characters in both of them must be…
Q: The following is a message encrypted using additive cipher but you do not know the key. Decrypt the…
A: Given: The following is a message encrypted using additive cipher but you do not know the…
Q: Is it possible to tell the difference between a Trojan Horse, a virus, and a worm? Thanks. Viruses…
A: System security is one of the major issue in today's era. There are many techniques which is used by…
Q: Use the Caesar cipher to (a) Encrypt the message WHAT ARE YOU (b) Decrypt the message ZKHUH DUH BRX
A: REQUIRED:
Q: Which statement reflects a legitimate benefit of phishing?
A: We need to answer: Which statement reflects a legitimate benefit of phishing? A. B.…
Q: Decrypt the message MAXLJGTEAX which was encrypted using the affine cipher: Alphabet: A = 0, B =…
A: Decryption is the process of converting encrypted or encoded data back into its original, readable…
Q: Encrypt the following ciphertext "KLE" using Caesar cipher. O a. NHO O b. NOH O. OHN O d. HON
A: We know that we can encrypt any ciphertext by shifting it to 3 letters.
Q: A message is encrypted by shifting the ciphertext alphabet 13 places to the left and mapping the…
A: A Caesar cipher is also known as shift cipher. It is the one of simplest and widely known encryption…
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- ALO (Anderson - left - overs.) Enterprises is an organization that provides a wide variety of service offerings for clients. Service types available include bookkeeping, computer installation, computer repair, software installation, taxes, advertising, market surveys, etc. Each service engagement may involve multiple types of service and may include multiple employees. Each type of service has a standard hourly billing rate and can not be entered into the database unless at least one of ALQ's employees is capable of performing that type of service. Employees are trained to perform multiple types of services and can work on multiple service engagements. Employees earn a contracted annual salary based on their credentials, regardless of what services they actually end up performing. Clients are required to pay for a given service engagement in full ( with just one check) within two weeks of the completion date. It is possible for a client to pay for more than one service engagement with…Q2: Draw an ERD from the following business rules: Use proper notations for the type of attributes A software system is to be developed for an educational institute.The software is intended to be used by faculty members, students and designated support staff. System administrator will also use system for system administration and management. Student’sdata including names, registration number, cell numbers and address will be added and edited by Clerk. The data will be added at the timeof student reporting at campus. Student can enroll into any course of their choice from the offered courses. They can also request for dropping a course. Approval of course dropping of a student will be granted or refused by academic coordinatorsThe following attributes fom1 a relation that includes information about individua l computers, their vendors, software packages running on the computers, computer users, and user authorizations. Users are authorized to use a specific software package on a specific computer d uring a specific time frame (characterized with attributes UserAuthorization Starts and UserAuthoriza tionEnds and secured with UserAuthorizationPassword}. Software is licensed to be used on specific computers (potentially multip le software packages at the san1e time) until an expira tion time (SoftwarelicensePrice) a t a specific price. Computers are sold by vendors, and each vendor has a support person with an ID, nan1e, and phone extension. Each individual computer has a specific purchase price. The attributes are as follows: Based on this information, a. Identify the functional dependencies between the attributes. b. Identify the reasons why this relation is not in 3NF. c. Present the a ttributes organized so…
- Each publisher has a unique name; a mailing address and telephone number are also kept on each publisher. A publisher publishes one or more books; a book is published by exactly one publisher. A book is identified by its ISBN, and other attributes are title, price, and number of pages. Each book is written by one or more authors; an author writes one or more books, potentially for different publishers. Each author is uniquely described by an author ID, and we know each author’s name and address. Each author is paid a certain royalty rate on each book he or she authors, which potentially varies for each book and for each author. An author receives a separate royalty check for each book he or she writes. Each check is identified by its check number, and we also keep track of the date and amount of each check. As you develop the ERD for this problem, follow good data naming guidelines.Draw the associations that are described by the following business rules. Include the multiplicities for each relationship. (4 marks) A patient must be assigned to only one doctor, and a doctor can have one or many patient: An employee has one phone extension, and a unique phone extension is assigned to an employee. A bookstore sells at least one book, and a book can be sold at up to 10 other bookstores around town.Draw an ER diagram and then map it into a relational schema(database) for the following scenario.• For each MEMBER we keep track of the unique MemdID, a well as Name, Zip, and the Datethe membership was paid.• For each MEMBERSHIP type we keep track of the unique Mid, as well as MName and Price• For each PASS CATEGORY we keep track of the unique PassCatID, as well as PCName andPrice• For each ONE DAY PASS we keep track of the unique PassID and Date• For each MERCHANDISE item we keep track of the unique MrchID, as well as Name andPrice• For each sale TRANSACTION we keep track of the unique Tid and Date• Each member pays for exactly one membership type; each membership type has at leastone member but can have many members.• Each member can buy many day passes but does not have to buy any, each day pass wasbought by exactly one member• Each day pass belongs to exactly one pass category; a pass category can have manyindividual day passes issued for it but does not have to have any. • Each…
- Alert dont submit AI generated answer.In the ER diagram for a Point of Sale system, there are entities such as Cashier, Product,Checkout, Transaction, CheckoutStand, Return, Inventory, etc. Here inventory records each storagelocation and its capacity. Sometimes, a customer may need to come back to pickup their items afterchecking out while most of the time they leave the store with their purchases. Which of the following is thebetter design for manage transactions?A) Add an attriute to transaction to indicate whether goods have been pickuped or notB) Create two subtyeps of TransactionC) Create a weak entity Pickup to link with TransactionD) Add a relationship between Transaction and ProductDesign the back-end database for an online bookstore called “Books for You” (BFY); draw the entity-relationship diagram for the following order processing system. Order Processing System: BFY maintains a website to get customer orders. Customer can visit BFY website either directly or through other websites having partnership with BFY. All the customers are required to create an account before placing an order. Customers of BFY can be classified into individual customers and business customers. Privileges for business customers differ from that of individual customers. For example, business customers are given 30 or more days credit apart from some trade discount. Business customers mostly pay through checks and credit cards after receipt of the books whereas the individual customers have to make payment through a credit card when they place an order. BFY keeps a track of all the payments that it has to receive from credit card companies and banks. A customer can buy any book of…
- convert this plain text to ER diagram , I attached a picture with question for one diagram and it's wrong because there is no bookning "Each office employs one or more dentists, hygienists, andreceptionists each of whom have an employee number. Patientsare free to use any dental office but, naturally, must makeappointments in advance. A record of all such appointments iskept which specifies the patient’s name, the date and time ofthe appointment and a list of services performed. Adultpatients have a SIN (Social Insurance Number) but theirchildren typically do not. Each office provides specific services(e.g. cleaning, filling, X-rays, extraction, etc.) to the patients andbills them accordingly. Performing certain services consumessupplies (e.g. floss, amalgam, X-ray film, etc.). Such suppliesare purchased from a variety of suppliers each of whom isidentifiable by a unique supplier code. The current amount ofeach type of supply available is tracked so that when suppliesrun low, a new…Draw a clear and complete ER diagramneed help with this two quieries. students(sid,name,age,gpa) // sid is the primary key courses(cid,deptid, description) // cid,deptid is the primary key professors(ssn,name,address,phone,deptid) // ssn is the primary key enrollment(sid,cid,section,grade) cid makes reference to the courses table. // sid, cid, and section is the primary key teaches(cid,section,ssn). cid, section makes reference to the enrollment table // cid, section is the primary key a. List of professors that work for departments with more than 20 faculty members and that offer more large sections than small and medium sections combined. b. Assume grades are A, B, C, D, F where D and F are failing grades. For each course (section) find the percentage of students that failed the course.