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Questions and Answers
What is the RSA algorithm used for?
What is the RSA algorithm used for?
- Generating random numbers
- Sorting data
- Selecting two prime numbers and calculating public and private keys (correct)
- Converting text to binary code
What is involved in encryption and decryption in RSA?
What is involved in encryption and decryption in RSA?
- Dividing two numbers
- Finding the square root of a number
- Adding two numbers together
- Raising an integer to an integer power mod n (correct)
Why is the efficiency of exponentiation a consideration in RSA?
Why is the efficiency of exponentiation a consideration in RSA?
- Because it makes the encryption more secure
- Because it is irrelevant to the encryption process
- Because it is fun to calculate
- Because the exponents can potentially be very large (correct)
What is the fast modular exponentiation algorithm used for in RSA?
What is the fast modular exponentiation algorithm used for in RSA?
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Why is a specific choice of e usually made in RSA?
Why is a specific choice of e usually made in RSA?
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What types of attacks can RSA be vulnerable to?
What types of attacks can RSA be vulnerable to?
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What are digital signatures used for in RSA?
What are digital signatures used for in RSA?
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Study Notes
- The RSA algorithm involves selecting two prime numbers and calculating public and private keys.
- Encryption and decryption in RSA involve raising an integer to an integer power mod n.
- The efficiency of exponentiation is a consideration in RSA due to potentially large exponents.
- The fast modular exponentiation algorithm can be used to efficiently compute ab mod n.
- A specific choice of e is usually made in RSA to speed up the operation using the public key.
- RSA can be vulnerable to brute force, chosen ciphertext, hardware fault-based, mathematical, and timing attacks.
- Digital signatures are used for authenticating source and data integrity.
- Digital signatures are created by encrypting a hash code with a private key.
- Symmetric key exchange using public-key encryption can be used for secure communication.
- Digital envelopes can protect a message without needing a shared secret key.
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