Q2: Based on Diffie-Hellman protocol, if the public key is p = 827, and c = 532. The private key a = 41. Find the value of public key g.
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- What is the Diffie-Hellman algorithm for exchanging a secret session key?Can you please help me with this: RSA can be used for: Digital Signature Encryption and Decryption Key exchange All the above RSA is secure because: Factoring large integers is easy Factoring large integers is hard Modular arithmetic is hard Modular arithmetic is easy Which description about the Diffie-Hellman Protocol is NOTcorrect? Diffie-Hellman Protocol is used to negotiate a key over a public channel. The base gand modulus pare publicly known. Diffie-Hellman Protocol authenticates each party. Diffie-Hellman Protocol is vulnerable to the Man-In-The-Middle Attack.q12- The security of symmetric encryption depends on the secrecy of the algorithm, not the secrecy of the key as the key is shared between the sender and receiver. Select one: True False
- Please enumerate and elaborate on the ideal qualities of a cryptographic hash function.Find the greatest common divisor of 26 and 5 using Euclidean algorithm. An encryption function is provided by an affine cipher ?:? → ?, ?(?) ≡ (5? + 8)??? 26, ? = {1,2, … , 26}Find the decryption key for the above affine cipher. Encrypt the message with the code 15and 19.In digital signature, the receiver uses the private key of the sender to decrypt the digital signature and restore the original hash of the message. True False
- Computer Science In the context of the ElGamal signature, the public key is (257, 76, x), where "x" is not known to you. Two packages were sent through the insecure channel as follows: (400, 54, 150) (321, 54, 149) Was there a re-use of the ephemeral key? If the answer is "yes", find it. If the answer is "no," answer "no" without the quotations.Can an AES key be shared secret encrypted? Justify your response Distinguish between hash and keyed hash See a real-world example of a one-keyed hash function.The contrast between private and public keys in cryptography
- In a public key, cryptosystem using RSA algorithm, user uses two prime numbers 5 and 7. He chooses 11 as Encryption key, find out decryption key. What will be the cipher text, if the plaintext is 2? Decrypt the cipher text, what will be the value of plain text?Can an AES key be encrypted using a shared secret? Defend your response Compare hash function with keyed hash function. View an example of a one-keyed hash function.1. Asymmetric Encryption and Message Authentication: a) The primitive root of a prime number is the basic principle of Diffie-Hellman. i) Is 3 the primitive root of 11? Show the proof with your calculation. ii) What are the important criteria for selecting a prime number in cryptography? Is 11 a good choice for such a purpose? b) Find the parameters stated using the Diffie-Hellman methods, given the user A and B shared a prime number and its primitive root of 23 and 5, respectively. i) If user A public key value is 8, find the A’s private key. ii) If user B public key value is 19, what is the common secret key? c) In the following scenario, we will compare the security services that are given by digital signatures (DS) and message authentication codes (MAC). We assume that James can read all messages send from Chan to Badrul and the other way around, too. James has no knowledge of any keys but the public one in the case of DS. State whether and…