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Question 5 a) Roger wants to send Simon a message asking him to transfer RM6,000 to his account. Roger wishes to use RSA algorithm to encrypt this message and send to Simon. Suppose Roger's RSA modulus n = 55 = 5 x 11 and his decryption key d= 37, determine the encryption key e. Show your working. Is this possible for large values of n say of the order of 1024 bits? Give your reasons in not more than two or three sentences.

Question 5 a) Roger wants to send Simon a message asking him to transfer RM6,000 to his account. Roger wishes to use RSA algorithm to encrypt this message and send to Simon. Suppose Roger's RSA modulus n = 55 = 5 x 11 and his decryption key d= 37, determine the encryption key e. Show your working. Is this possible for large values of n say of the order of 1024 bits? Give your reasons in not more than two or three sentences.

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Question 5 a) Roger wants to send Simon a message asking him to transfer RM6,000 to his account. Roger wishes to use RSA algorithm to encrypt this message and send to Simon. Suppose Roger's RSA modulus n = 55 = 5 x 11 and his decryption key d = 37, determine the encryption key e. Show your working. Is this possible for large values of n say of the order of 1024 bits? Give your reasons in not more than two or three sentences. b) Alif wishes to invest in shares on ABC Sdn Berhad an e-commerce company. He asks Puteri his professional fund manager to buv 100 lot of shares bv sending him an authenticated message M = 14 using RSA algorithm. Alif uses public key n = 119, e = 13, and private key d = 37. Derive the signature that would be used by Alif. Explain how Puteri would verify Alif's signature.
Transcribed Image Text:Question 5 a) Roger wants to send Simon a message asking him to transfer RM6,000 to his account. Roger wishes to use RSA algorithm to encrypt this message and send to Simon. Suppose Roger's RSA modulus n = 55 = 5 x 11 and his decryption key d = 37, determine the encryption key e. Show your working. Is this possible for large values of n say of the order of 1024 bits? Give your reasons in not more than two or three sentences. b) Alif wishes to invest in shares on ABC Sdn Berhad an e-commerce company. He asks Puteri his professional fund manager to buv 100 lot of shares bv sending him an authenticated message M = 14 using RSA algorithm. Alif uses public key n = 119, e = 13, and private key d = 37. Derive the signature that would be used by Alif. Explain how Puteri would verify Alif's signature.
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