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28. Use a brute-force attack to decipher the following message enciphered by Alice using an addit...
3 Brute Force Attack vs. Birthday Attack (50 pts) Message-Digest Algorithm (MD5) and Secure Hash Algorithm 1 (SHA-1...
3 Brute Force Attack vs. Birthday Attack (50 pts) Message-Digest Algorithm (MD5) and Secure Hash Algorithm 1 (SHA-1) are com- monly used cryptographic hash functions 1. Do research to find the mmbers of bits used in MDS and SHA-1. (8 pts)
3 Brute Force Attack vs. Birthday Attack (50 pts) Message-Digest Algorithm (MD5) and Secure Hash Algorithm 1 (SHA-1) are com- monly used cryptographic hash functions 1. Do research to find the mmbers of bits used in MDS and SHA-1....
3 Brute Force Attack vs Birthday Attack (50 pts) Message-Digest Algorithm (MD5) and Secure Hash Algorithm 1 (SHA...
3 Brute Force Attack vs Birthday Attack (50 pts) Message-Digest Algorithm (MD5) and Secure Hash Algorithm 1 (SHA-1) are com- monly used cryptographic hash functions 1. Do research to find the numbers of bits used in MD5 and SHA-1. (8 pts) perform An adversary an attack to a hash algorithm by applying random inputs can and y (y) that satisfie Hx) and repeating until finding two inputs H(y) where H() denotes a hash code. This is called a "hash collision."...
5. ENCRYPT following message using VIGENERE CIPHER a. attack at dawn; Key = SECRET b. no...
5. ENCRYPT following message using VIGENERE CIPHER a. attack at dawn; Key = SECRET b. no travel in april; Key = PANDEMIC
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...
Substitution Cipher Ke 1. Decipher the following ciphertext using the substitution cipher key shown above: (4 points) Ciphertext: DOVMYWOJAYJMYWZBAOXOADY!U I Plaintext: The following information was...
Substitution Cipher Ke 1. Decipher the following ciphertext using the substitution cipher key shown above: (4 points) Ciphertext: DOVMYWOJAYJMYWZBAOXOADY!U I Plaintext: The following information was extracted from The BLACK Chamber's Pigpen Cipher page. The content is available at https:/simonsingh net The_Black Chamber'pigpen html. "The Pigpen Cipher was used by Freemasons in the l8th Century to keep their records private. The cipher does not substitute one letter for another; rather it substitutes each letter for a symbol The aiphabet is written...
Consider the following scenario: Alice receives a message, a digital signature and a certificate from Bob....
Consider the following scenario: Alice receives a message, a digital signature and a certificate from Bob. In order to verify the signature, Alice does the following: Hashes the received message using the same hash algorithm that Bob used, that's your calculated hash Decrypts the signature using the public key contained in the certificate, that your decrypted hash Compares the calculated hash and the decrypted hash Because the 2 hashes are identical, Alice goes on and: Checks the validity period on...
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...
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,...
Answer all of it asap Discrete mathematics Problem 10 (10 pts) Alice and Bob would like to exchange a key using the...
Answer all of it asap
Discrete mathematics
Problem 10 (10 pts) Alice and Bob would like to exchange a key using the Diffie-Hellman protocol that uses the following public information: the cyclic group Zio, and 5 as its base element. Alice: If she chooses 3 as her private key, which element does she send to Bob. Bob: If he chooses 4 as his private key, which element does he send to Alice Key-Exchanged: What is their Private Key exchanged.
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Chapter 06 Applied Cryptography 1. How is integrity provided? A. Using two-way hash functions and digital...
Chapter 06 Applied Cryptography 1. How is integrity provided? A. Using two-way hash functions and digital signatures B. Using one-way hash functions and digital signatures C. By applying a digital certificate D. By using asymmetric encryption 2. Which term refers to the matching of a user to an account through previously shared credentials? A. Nonrepudiation B. Digital signing C. Authentication D. Obfuscation 3. Which term refers to an arranged group of algorithms? A. Crypto modules B. Cryptographic service providers (CSPs)...
3 Brute Force Attack vs. Birthday Attack (50 pts) Message-Digest Algorithm (MD5) and Secure Hash Algorithm 1 (SHA-1) are com- monly used cryptographic hash functions 1. Do research to find the mmbers of bits used in MDS and SHA-1. (8 pts)
3 Brute Force Attack vs. Birthday Attack (50 pts) Message-Digest Algorithm (MD5) and Secure Hash Algorithm 1 (SHA-1) are com- monly used cryptographic hash functions 1. Do research to find the mmbers of bits used in MDS and SHA-1....
3 Brute Force Attack vs Birthday Attack (50 pts) Message-Digest Algorithm (MD5) and Secure Hash Algorithm 1 (SHA-1) are com- monly used cryptographic hash functions 1. Do research to find the numbers of bits used in MD5 and SHA-1. (8 pts) perform An adversary an attack to a hash algorithm by applying random inputs can and y (y) that satisfie Hx) and repeating until finding two inputs H(y) where H() denotes a hash code. This is called a "hash collision."...
5. ENCRYPT following message using VIGENERE CIPHER a. attack at dawn; Key = SECRET b. no travel in april; Key = PANDEMIC
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...
Substitution Cipher Ke 1. Decipher the following ciphertext using the substitution cipher key shown above: (4 points) Ciphertext: DOVMYWOJAYJMYWZBAOXOADY!U I Plaintext: The following information was extracted from The BLACK Chamber's Pigpen Cipher page. The content is available at https:/simonsingh net The_Black Chamber'pigpen html. "The Pigpen Cipher was used by Freemasons in the l8th Century to keep their records private. The cipher does not substitute one letter for another; rather it substitutes each letter for a symbol The aiphabet is written...
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,...
Answer all of it asap
Discrete mathematics
Problem 10 (10 pts) Alice and Bob would like to exchange a key using the Diffie-Hellman protocol that uses the following public information: the cyclic group Zio, and 5 as its base element. Alice: If she chooses 3 as her private key, which element does she send to Bob. Bob: If he chooses 4 as his private key, which element does he send to Alice Key-Exchanged: What is their Private Key exchanged.
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