Q.32 Explain role of key distribution centre in symmetric system.
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Q: Q.32 Explain role of key distribution centre in symmetric system.
A: Given: Describe the function of key distribution in a symmetric system.
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- Question. Discuss Diffie-Hellman key exchange protocols to enable two users to securely exchange akey that can be used for subsequent encryption of messages.Assume that the BP rig in the Gulf of Mexico has four major safety devices all connected in a series. The corresponding reliabilities of these four devices are: Device 1: 0.85 Device 2: 0.95 Device 3: 0.80 Device 4: 0.80 Device 2 has a single backup system with identical reliability. Device 3 has a single backup system that has two subcomponents (each with a reliability of .50) that are connected in a series. Device 4 is backed up by two backup systems (each with reliability of .75). What is the likelihood that these safety devices (working together) will prevent another disaster? Please show all calculations.Q4a) Consider the Diffie-Hellman scheme for key exchange, with common prime q = 17 and a primitive root = 3. What is the shared key? (Assume values for XA and XB)
- Consider the five-year treasury security data tcm5y (data found in package series in R). Identify the possible orders (p, q) for ARMA(p, q). Compare withauto.arima(). Please use R coding3.3 Assume that Personal Identification Numbers (PINs) are formed by nine-digit combinations of numbers 0 to 9. Assume that an adversary is able to attempt three PINsper second.a. Assuming no feedback to the adversary until each attempt has been completed,what is the expected time to discover the correct PIN?b. Assuming feedback to the adversary flagging an error as each incorrect digit isentered, what is the expected time to discover the correct PIN?(a) Draw a network diagram for the timeline chart in Figure Q3. (b) Determine all paths based on the answer in Q3(a)
- Differential low cost access resulting from path dependance/first mover advantage is likely to be: Group of answer choices Both rare and inimitable Rare, but not inimitable Neither rare nor inimitable9 - What is the table value of 15 degrees of freedom bidirectional "t" at 99% confidence level? a) 1,753 B) 2,947 NS) 3,286 D) 2,977 TO) 2,1311.a. Public Key cryptography was developed to address two key issues including key distribution. Briefly explain with example how key distribution can be achieved. 1.b. Explain with a well labelled diagram how Alice and Bob can achieve both confidentiality and authentication using related public key and private key.
- Consider a scenario in which Bob is performing a transaction at ATM machine. In this scenario, the Bob will use his PIN code along-with the ATM card to access his account. How the CIA goals should be achieved in this scenario? Also indicate the degree of importance of each requirement.Consider Diffie-Hellman protocol. a. Given p = 13, g = 4, SA = 4, and SB = 5. Compute TA, TB, and the shared key k using Diffie-Hellman protocol. b. If we use the Caesar Cipher with the shared key k obtained in Part. a for encryption and decryption, what is the ciphertext of the plaintext “SECURITY”?A and B use Diffie Helman key exchange with parameters p = 79, Q=3. A choosesprivate key 5 and B choose its private key as 7. What is the common secret computedby A and B?