Which algorithm is used to generate the IKEv2 session key?
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The algorithm used to generate the IKEv2 session key is Diffie-Hellman.
IKEv2 (Internet Key Exchange version 2) is a protocol used to establish a secure, authenticated connection between two devices, typically a VPN connection. During the initial handshake between the devices, IKEv2 uses the Diffie-Hellman key exchange algorithm to establish a shared secret key between the two devices, which is then used to encrypt and authenticate subsequent communication.
The Diffie-Hellman key exchange algorithm is a cryptographic algorithm used to securely exchange cryptographic keys over a public channel. The algorithm allows two parties to agree on a shared secret key without exchanging the key directly. The parties generate their own private keys and then exchange public keys. Each party then combines their own private key with the other party's public key to generate a shared secret key. Because the private keys are never exchanged, this process is secure even if the public keys are intercepted by an eavesdropper.
The other answer choices, Rivest, Shamir, and Adleman (RSA), Secure Hash Algorithm (SHA), and Rivest Cipher 4 (RC4) are all cryptographic algorithms, but they are not used to generate the IKEv2 session key. RSA is an encryption and authentication algorithm that uses a public-private key pair. SHA is a hash function used for data integrity verification. RC4 is a symmetric stream cipher used for encryption.