How could a second hash value (such as SHA256, in this case) help to verify the integrity of the download? Explain.
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How could a second hash value (such as SHA256, in this case) help to verify the integrity of the download? Explain.
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- 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?How can a hash value be used to authenticate a communication? Is Is it necessary to retrieve the secret key in order to abuse a MAC algorithm?In what ways might a message's hash value be used to verify its authenticity? Is it necessary to discover the secret key in order to break a MAC algorithm?
- Differentiate hash from MAC. Demonstrate how they may be used to verify communications. What authentication criteria do they not fulfill, and what probable attacks and algorithm failures exist?On Cyberchef hashes are generated, but there isn’t any input but it is giving be a hash? Why is this happening?MAX is the security administrator for an administrator for an organization that uses a remote access VPN. The VPN depends upon RADIUS authentication, and MAX would like to assess the security of that serivce. Which one of the following hash functions is the strongest cryptographic hash protocol support by RADIUS?
- I need someone to give me short Answers for each question with short perfect explanations: 1. Explain the computer security objectives? or what are the three objectives of Computer Security? 2. What is the difference between passive and active security threats? Give an example of each one? 3. what is security mechanism? 4. Why HASH is not sufficient for a message authentication? What is the main difference between HASH function and HIMAC? 5. List three approaches to message authentication? 6. How many keys are required fir two people to communicate vis a symmetric cipher? 7. List the parameters of a symmetric block cipher for greater security? 8. What are the two approaches to attacking a secure hash function? 9. What is message authentication code? 10. What is symmetric encryption? What are the two reequipments for secure use of symmetric encryption?1-What kind of attack makes the Caesar cipher virtually unusable? Escrow attack Man-in-the-middle attack Transposition attack Frequency Analysis 2-When an attacker is using a brute force attack to break a password, what are they doing? Trying to recover the key without breaking the encryption. Looking at the hash values and comparing it to thousands or millions of pre-calculated hashes. Looking at common letter frequency to guess the plaintext. 4. Trying every possible key to, over time, break any encryptionWhen sending a large file, which method uses less encryption operations, cypher block chaining or cypher feedback mode?And which one is much more effective?
- Separate hash from MAC code. Demonstrate their potential application in establishing message authenticity. In what ways do they fail to provide enough authentication, and what kind of attacks or algorithmic flaws are conceivable?What is a cryptographic hash function (CFH), and how does it work??q22B- What is asymmetric encryption ? Give an example ?