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…

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.