9.6 Asymmetric Encryption
Implements the Diffie-Hellman key exchange protocol using elliptic curve cryptography.
ECDH
Which form of asymmetric cryptography is based upon Diffie-Hellman?
ElGamal
Exist only for the lifetime of a specific communication session.
Ephemeral keys
Mary wants to send a message to Sam. She wants to digitally sign the message to prove that she sent it. Which key would Mary use to create the digital signature?
Mary's private key
Uses no deterministic algorithm when generating public keys
Perfect forward secrecy
Above all else, what must be protected to maintain the security and benefit of an asymmetric cryptographic solution, especially if it is widely used for digital certificates?
Private keys
Which of the following algorithms are used in asymmetric encryption? (select two)
RSA Diffie-Hellman
Mary wants to send a message to Sam so that only Sam can read it. Which key would be used to encrypt the message?
Sam's public key
A receiver wants to verify the integrity of a message received from a sender. A hashing value is contained within the digital signature of the sender. Which of the following must the receiver use the access the hashing value and verify the integrity of the transmission?
Sender's public key
How many keys are used with asymmetric (public key) cryptography?
Two
ElGamel
An asymmetric encryption system based on a discrete logarithm problem.
Rivest Shamir Adleman (RSA)
An asymmetric encryption system based on factoring large numbers into their prime values.
Elliptic Curve Cryptography (ECC)
An asymmetric encryption system based on groups of numbers in an elliptical curve.
Merkle-Hellman Knapsack
An asymmetric encryption system based on the subset sum problem (given a list of numbers and a sum, determine the subset used to create the sum).
Asymmetric encryption
An encryption method that uses two mathematically related keys called a key pair.
Which of the following are characteristics of ECC? (select two)
Asymmetric encryption Uses a finite set of values within an algebraic field
Which of the following is used in conjunction with a local security authority to generate the private and public key pair used in asymmetric cryptography?
CSP
Which cryptography system generates encryption keys that could be used with DES, AES, IDEA, RC5 or any other symmetric cryptography solution?
Diffie-Hellman
Can be reused by multiple communication sessions.
Static keys
Diffie-Hellman key exchange
The first asymmetric algorithm developed by Whitfield Diffie and Martin Hellman in 1976 that generates symmetric keys simultaneously at sender and recipient sites over non-secure channels.
The success of asymmetric encryption is dependent upon which of the following?
The secrecy of the key