RSA Encryption Question:
QUESTION 37 RSA encryption is a type of __________ encryption. A. hashing B. symmetric encryption C. public key encryption
This question tests your knowledge of encryption and decryption using the RSA method. the numbers in soled are deliberately chosen to be mall enough to focus on gown understanding without excessive calculations. Alice and Bob decide to use an RSA cryptosystem with public key (77, 13) for communication. Alice wants to send Bob the message m = 22. Determine Alice's ciphertext c. Determine Bob's private boy Carry out Bob's decryption of Aloe's ciphertext c, and compare his result with Alice's...
After looking at the RSA algorithm for asymmetric key encryption and decryption. And after looking at Diffie-Hellman Exchange and at the Elgamal encryption scheme that can use the key derived from the exchange. State the justification for having this alternate mechanism when RSA is already well established. Consider the security and the computational aspects of the schemes. Be as specific as possible.
In RSA, it is desirable to select a small encryption exponent, "e", in order to improve the efficiency of encryption. However, a small encryption exponent should not be used if the same message is sent to many entities, because an eavesdropper can recover the plaintext "m", without knowing the private key, "k" Explain how the eavesdropper can recover the plaintext "m". Describe a practical countermeasure for thwarting the attack described above, assuming that a small encryption exponent is used and...
Using RSA encryption with p=47, q=61, and e = 7, encrypt the following message in two-letter blocks: FAKE
Perform encryption and decryption using the RSA algorithm, for the following p = 3, 9 = 11, e = 7 M = 5 What is the public key PU? What is the private key PR? What is the cipertext C? How does the decryption to covert the ciphertext back to the plaintext M?
4. Suppose you wish to encrypt the message, M 42 using RSA encryption. Given a public key where p- 23 and q-11 and the relative prime e- 7. Find n, and show all necessary steps to encrypt your message (42). (Hint: check p.411 of the text for information on public key RSA) (5 points)
1. Derive the RSA encryption method, justifying your steps from t sults. 2. Encrypt 0002 with public key (7,77). Find the decryption key
Digital Signature (5-5): In the course notes we looked at RSA for encryption and signatures (using exactly the same mathematical formula), and ElGamal for encryption. There has been several questions on using ElGamal for signature. The ElGamal encryption algorithm cannot be used for signatures but there are signature schemes that is based on discrete logarithm. (a) Search for simple explanation of the ElGamal signature scheme and DSA signature scheme (Hint: Wikipedia). Can these algorithms be used to encrypt a message?...
(10 points). What is the ciphertext that is produced when RSA encryption with key (n , k ) = ( 2669 , 3 ) is used to encrypt the message BEST WISHES? (10 points). What is the ciphertext that is produced when RSA encryption with key (n , k ) = ( 2669 , 3 ) is used to encrypt the message BEST WISHES?