Plain DH key exchange (DHKE) protocol is vulnerable against man-inthe- middle (MITM) attacks. In the slides of the unit, we mention that this attack can be prevented by using certificates. Provide a variant of the DHKE protocol that uses certificates and prevents MITM attacks.

Can a hash value be protected such that it may be used for message authentication? Is it possible to attack a MAC technique without discovering the key's ciphertext?

Which of the following statements about Anonymity is CORRECT: A. Bitcoin is anonymous as it doesn't use any name at all.  B. In the Bitcoin network, you can only create a limited number of addresses.  C. Unlinkability means that if a user interacts with the system repeatedly, these different interactions should not be able to be tied to each other from the point of view of the adversary. D. The anonymity set of your transaction is the set of transactions without real identities.

To solve the following issue, you must first identify the vulnerabilities in each authentication technique.Passwords are validated by Bob by first hashing them and then looking them up in a database of hashes.Bob uses a hashing method to verify a password against a list of previously hashed passwords.

End-to-end encryption could be a problem for application-level proxies. Please offer a method for handling encrypted payloads via an application-level proxy.

Please give me correct solution.

Give an exhaustive rundown of the various DNS record types currently in use. All of them need to be broken down into its component parts, with supporting evidence and practical examples provided to prove their efficacy. In order to streamline operations, it might help to use the same alias for both the email server and the website.