What characteristic of public key cryptography allows for two parties to securely exchange a symmetric key?Key escrowDigital signaturesDiffie-Hellman key exchangeRSA encryptio
Question
What characteristic of public key cryptography allows for two parties to securely exchange a symmetric key?Key escrowDigital signaturesDiffie-Hellman key exchangeRSA encryptio
Solution
The characteristic of public key cryptography that allows for two parties to securely exchange a symmetric key is the Diffie-Hellman key exchange.
Here's a step-by-step explanation:
- Each party generates a public-private key pair.
- They then exchange their public keys with each other.
- Upon receiving the other party's public key, each party uses their own private key and the received public key to generate a shared secret key.
- This shared secret key is the symmetric key that can be used for further encrypted communication.
The security of this process lies in the fact that even if a third party intercepts the public keys during the exchange, they cannot derive the shared secret key without knowing one of the private keys.
Similar Questions
Which type of cryptographic key is intended to be shared publicly?The symmetric keyThe private keyThe public keyThe secret key
What is the primary benefit of using public key cryptography over symmetric key cryptography?AIncreased data encryption speedBEnhanced data compression capabilitiesCSimplified secure key management and distributionDReduced computational complexity
You are creating a security product that must facilitate the exchange of symmetric encryption keys between two parties that have no way to securely exchange keys in person. What algorithm might you use to facilitate the exchange?Group of answer choicesBlowfishRijndaelVernamDiffie–Hellman
Symmetric vs Asymmetric Cryptography
By using asymmetric cryptography, what does Bob have to do to send a secret message to Alice? Bob must encrypt the message with his public key and Alice will decrypt with Bob’s private keyBob must encrypt the message with his private key and Alice decrypts it with Bob’s public key.Bob must encrypt the message with Alice’s private key and Alice decrypts it with her public key.Bob must encrypt the message with Alice’s public key and Alice decrypts it with her own private key.
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