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- Let your key be the IP address 234.10.90.0 and you want to hash it and then put it in a slot in the hash table with size 257. Do this using Modulo Primes Method and Polynomial Hash. Write all the details.Web clients are required to have their own built-in authentication and authorization systems in order to access the protected resources of a web server. Do the treatments with many layers bring any further benefits? Give specific instances to back up your assertions.Which of these can be used to improve defenses against host attacks on a password system in which the passwords are stored in plain text (note: the system must remain a user-knowledge-based authentication system)? Select one: a. Hash the passwords and store the hashes, rather than the plaintext passwords b. Store the password on a physical object instead c. Use one-time passcodes instead d. Limit the number of attempts allowed
- You find out that your University is using an authenticated messaging system that is vulnerable to a length extension attack, because it uses an iterative hash function with the insecure MAC construction t = h(K || m). By eavesdropping on the network you intercept the following message m from your professor to the administration: “Set final course grade to A for J. Smith,” along with its tag t. Give an example of a believable message that you could forge and send using a length-extension attack, and describe how the attack would work. Specify how you would use the hash function and what pieces of data you would send.How can I decrypt this hash password using a session injector?must answered ALL parts for upvote, as per chegg guidelines, up to four subparts may be answered: - what are two desirable properties of IV in network security? - a cryptographic hash function is used to provide confidentiality and integrity of a message, true or false? - when AES is used with the CBC mode, the size of an IV is 256 bit long, true or false?
- For a web client to get access to a web server's restricted data, the client must first use the server's built-in authentication and authorization features. Besides these, are there any other advantages of use layered protocols? You should include instances to back up your arguments.If we only want to download a file if the Web server has a newer version than the one the client has already cached, we can attach the header…Group of answer options If-Modified-Since Time-to-live Expires Out-of-dateA. We have decided to change the type of hashing we use to a newer version that is collision resistant. What happens when a hash collision occurs? You can figure out the plain text from the hash. When two different plaintexts produce the same hash. The same plain text produces two different hashes using the same hash function. A variable-length text produces a fixed-length hash. B.“Alice” and “Bob” are talking about hashing and they use the abbreviation MAC. What are they talking about? Message Authentication Code. Media Access Control. Mandatory Access Control. Message Access Code. C.Which one of the following is not one of the basic requirements for a cryptographic hash function? The function must be collision free. The function must work on fixed-length input. The function must be relatively easy to compute for any input. The function must be one way. D.Bob wants to produce a message digest of a 2,048-byte message he plans to send to Alice. If he uses the SHA-1 hashing…
- Use built-in authentication and authorization services on the web server when a client requests access to restricted data. In favor of layered protocols, which of the following two reasons do you find more convincing? To prove your claim, please provide specific instances.server allows upper and lowercase letters and numbers for passwords, size limit 10. if size of a salt used in server is 16 bits, how many attempts in worse case needed for brute force attack to crack password?What type of authentication method is displayed in this picture? Multi-Factor Authentication Biometric Authentication Token-based authentication Single Sign-on 2.Wendy is examining the logs of a web server that was compromised by a remote attacker. She notices that right before the attack, the logs show a series of segmentation fault errors. Other logs indicate that the attacker sent very long input strings to the web server that had malicious commands at the end of the string. What type of attack most likely took place? SQL Injection Cross-site request forgery Cross-Site scripting Buffer Overflow 3.Jessica is combatting a security incident where a specific piece of malware is continually infecting systems on her network. She would like to use application control technology to block this file. What type of application control should she use? Greylisting Bluelisting Whitelisting Blacklisting