Homework Answers
yes this kind of communication is secure because in this digital sign is used . hence when alice send message m1 with a random number r1 using digital signature to bob . by using digital signature this messgae become end to end secure .so that in between no hacker or attacker can get to know what was there in that message even if message is stolen it will not be readby third party / hacker /fake user . and in same manner bob replies which is secure .another method can be encryption in which simple text message is converted to secret/ciper text which can only be read by using keys which are owned by sender and real receiver this method also increases security
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Now, suppose Alice and Bob use random numbers to enhance security. Alice signs the combination of...
Suppose, Bob (the sender) wants to send a message to Alice. Before sending the message, Bob generates a digital signatur...
Suppose, Bob (the sender) wants to send a message to Alice. Before sending the message, Bob generates a digital signature. Assume that Bob and Alice use both of the public-key cryptography system and hash function when computing digital signatures. Say, the hash function used to compute and verify signatures is insecure, but the public-key cryptography system is secure. Show that Trudy can forge signatures.
Suppose, Bob (the sender) wants to send a message to Alice. Before sending the message, Bob generates a digital signatur...
Suppose, Bob (the sender) wants to send a message to Alice. Before sending the message, Bob generates a digital signature. Assume that Bob and Alice use both of the public-key cryptography system and hash function when computing digital signatures. Say, the hash function used to compute and verify signatures is insecure, but the public-key cryptography system is secure. Show that Trudy can forge signatures.
Question1: Alice and Bob use the Diffie–Hellman key exchange technique with a common prime q =...
Question1: Alice and Bob use the Diffie–Hellman key exchange technique with a common prime q = 1 5 7 and a primitive root a = 5. a. If Alice has a private key XA = 15, find her public key YA. b. If Bob has a private key XB = 27, find his public key YB. c. What is the shared secret key between Alice and Bob? Question2: Alice and Bob use the Diffie-Hellman key exchange technique with a common...
Suppose that Alice wants to initiate a message exchange (also called session) to instruct her bank, NetBank, to pay Bob N40. Alice shares a long-term secret, X, with NetBank (hereafter denoted as...
Suppose that Alice wants to initiate a message exchange (also called session) to instruct her bank, NetBank, to pay Bob N40. Alice shares a long-term secret, X, with NetBank (hereafter denoted as C). Alice starts the session by sending a service request, (A, C, n), to NetBank, 3. a. where A is Alice's identity, C is NetBank's identity, and n is a nonce. Assume that NetBank keeps a record of the nonces used by Alice for X. Answer the following...
2. Alice is a student in CSE20. Having learned about the RSA cryptosystem in class, she...
2. Alice is a student in CSE20. Having learned about the RSA cryptosystem in class, she decides to set-up her own public key as follows. She chooses the primes p=563 and q = 383, so that the modulus is N = 21 5629. She also chooses the encryption key e-49. She posts the num- bers N = 215629 and e-49 to her website. Bob, who is in love with Alice, desires to send her messages every hour. To do so,...
Risk management in Information Security today Everyday information security professionals are bombarded with marketing messages around...
Risk management in Information Security today Everyday information security professionals are bombarded with marketing messages around risk and threat management, fostering an environment in which objectives seem clear: manage risk, manage threat, stop attacks, identify attackers. These objectives aren't wrong, but they are fundamentally misleading.In this session we'll examine the state of the information security industry in order to understand how the current climate fails to address the true needs of the business. We'll use those lessons as a foundation...
CASE 8 Unlocking the Secrets of the Apple iPhone in the Name of access the male...
CASE 8 Unlocking the Secrets of the Apple iPhone in the Name of access the male San Bernardino suspect's iPhone 5c. Cook stated: Antiterrorism We are challenging the FBI's demands with the deepes respect for American democracy and a love of our country. We believe it would be in the best interest of everyone to step back and consider the implications While we believe the FBI's intentions are good, if would be wrong for the w e nt to force...
photos for each question are all in a row (1 point) In the following questions, use...
photos for each question are all in a row
(1 point) In the following questions, use the normal distribution to find a confidence interval for a difference in proportions pu - P2 given the relevant sample results. Give the best point estimate for p. - P2, the margin of error, and the confidence interval. Assume the results come from random samples. Give your answers to 4 decimal places. 300. Use 1. A 80% interval for pı - P2 given that...
C++ Inheritance Problem Step a: Suppose you are creating a fantasy role-playing game. In this game...
C++ Inheritance Problem Step a: Suppose you are creating a fantasy role-playing game. In this game we have four different types of Creatures: Humans, Cyberdemons, Balrogs, and elves. To represent one of these Creatures we might define a Creature class as follows: class Creature { private: int type; // 0 Human, 1 Cyberdemon, 2 Balrog, 3 elf int strength; // how much damage this Creature inflicts int hitpoints; // how much damage this Creature can sustain string getSpecies() const; //...
First, read the article on "The Delphi Method for Graduate Research." ------ Article is posted below...
First, read the article on "The Delphi Method for Graduate Research." ------ Article is posted below Include each of the following in your answer (if applicable – explain in a paragraph) Research problem: what do you want to solve using Delphi? Sample: who will participate and why? (answer in 5 -10 sentences) Round one questionnaire: include 5 hypothetical questions you would like to ask Discuss: what are possible outcomes of the findings from your study? Hint: this is the conclusion....
Suppose that Alice wants to initiate a message exchange (also called session) to instruct her bank, NetBank, to pay Bob N40. Alice shares a long-term secret, X, with NetBank (hereafter denoted as C). Alice starts the session by sending a service request, (A, C, n), to NetBank, 3. a. where A is Alice's identity, C is NetBank's identity, and n is a nonce. Assume that NetBank keeps a record of the nonces used by Alice for X. Answer the following...
2. Alice is a student in CSE20. Having learned about the RSA cryptosystem in class, she decides to set-up her own public key as follows. She chooses the primes p=563 and q = 383, so that the modulus is N = 21 5629. She also chooses the encryption key e-49. She posts the num- bers N = 215629 and e-49 to her website. Bob, who is in love with Alice, desires to send her messages every hour. To do so,...
CASE 8 Unlocking the Secrets of the Apple iPhone in the Name of access the male San Bernardino suspect's iPhone 5c. Cook stated: Antiterrorism We are challenging the FBI's demands with the deepes respect for American democracy and a love of our country. We believe it would be in the best interest of everyone to step back and consider the implications While we believe the FBI's intentions are good, if would be wrong for the w e nt to force...
photos for each question are all in a row
(1 point) In the following questions, use the normal distribution to find a confidence interval for a difference in proportions pu - P2 given the relevant sample results. Give the best point estimate for p. - P2, the margin of error, and the confidence interval. Assume the results come from random samples. Give your answers to 4 decimal places. 300. Use 1. A 80% interval for pı - P2 given that...
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