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: Encrypt the following message using Caesar cipher with a key of 3 The message is  (SECURITY IS THE…

A: answer starts from step 2

Q: (d) Showing your working, find the key of the Vigenère cipher below. JLGEQZYX JLGZFCSJ PYXSGMUR…

A: # decrypt ciphertext def decrypt(key, text): # alphabet alphabet = string.ascii_uppercase # alphabet…

Q: Obtain the cipher text for the plain text "mosque" using playfair cipher. All steps should be…

A: We need to encrypt the given string using playfair cipher.

Q: Alice is sending a confidential message to Bob. The message has to be sent securely in the…

A: I have provided answers in step2.

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 Rail fence cipher to encrypt the following plain text where key is length of your first name.…

A: The rail fence cipher is a transposition cipher that jumbles up the order of the letters of a…

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: Encrypt the following text "attack at dawn" using the key 2 4 5 9 2 1 3 17 7

A: Given, word: attack at dawn matrix   2    4     5                9    2     1                3    17…

Q: Encrypt using a shift cipher with the key K=4: MYLASTFAREWELL

A: Your question is about shift cipher encryption which given below :

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: Write your FULL NAME on a paper and the encrypt your FULL NAME using the following techniques: Rail…

A: Rail fence technique and columnar transposition these two are the encryption techniques.  And these…

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: MAXLJGTEAX which was encrypted using the affine cipher: f(p) = (5p+6) mod 26

A: The answer is...

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: How can we give the computer directions?

A: Program is a collection of instructions that performs a single operation. Software is numerous…

Q: I am curious in the Master of Fine Arts programme and would want to find out more about it. If…

A: Understanding the nature of various educational degrees, such as the Master of Fine Arts, and the…

Q: Do you believe the assault was caused by a virus or a worm? Give an explanation for your response.

A: Virus or Worm: Worms and viruses may seriously ruin our computerized data. In reality, both viruses…

Q: The Cipher text 'QCADIHSF' was Encrypted by Caesar Encryption, when you know the third letter from…

A: The Cipher text 'QCADIHSF' was Encrypted by Caesar Encryption, when you know the third letter from…

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: Write a script that inputs a line of plaintext and a distance value and outputs an encrypted text…

A: A Caesar cipher is a simple approach of encoding messages. Caesar ciphers use a substitution…

Q: Find the key

A: Plain Text : " SUCCESS IS NOT FINAL FAILURE IS NOT FATAL"  Cipher Text:…

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: How can we give the computer directions?

A: Computer Instruction:          An order sent to a computer processor by a computer program is known…

Q: Question 4 a) Demonstrate with the use of simple python line codes on how to: (i) encrypt  and (ii)…

A: According to company guidelines I am able to anser first question only since other two questions are…

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: How many pairs of cipher text and plaintext should be available to break Hill’s   Cipher? Please…

A: The Hill cipher is a block or polygraphic cipher, where groups of plaintext are enciphered as units.…

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: Give detailed reasons to you friend why you think using vernam cipher encryption algorithm is the…

A: Here two friends are sending messages over internet and they decided to encrypt the messages. One of…

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: FINAL FAILURE IS NOT FATAL" and the cipher text "INEEIJJZBJTNZDXEKAMPRETWKMYSRMRVUBS WESTZ". Find…

A:

Q: Which of the following are cryptographic algorithms? a. Hash function O b. RSA Oc. Ethereum d.…

A: Here is the solution of the above problem. See below steps.

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…

Q: Obtain the cipher text for the plain text "mosque" using playfair cipher. All steps should be…

A: We need to encrypt 'mosque' using playfair cipher.

Q: An ARMV7 “I-format" immediate value as an unsigned constant can range from 0 to:

A: An ARMV7 "I-format instruction is 32 bits". where Immediate : 12 bits rd : 4 bits rs : 4 bits op : 8…

Cryptography

Cryptography is a term used in computer science to describe secure information and communication techniques that transform messages in difficult-to-decipher ways using mathematical concepts and a set of rule-based calculations known as algorithms.