Microsoft Azure Architect Technologies (AZ-300) Practice Exam

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Asymmetric encryption uses how many keys for secure communication?

One
Two
Three
Four

The correct answer is: Two

Asymmetric encryption relies on a pair of keys to facilitate secure communication: a public key and a private key. The public key is used to encrypt data, which can be shared with anyone. However, only the corresponding private key, which is kept secret by the owner, can decrypt the information that was encrypted with the public key. This two-key system ensures a higher level of security, as even if the public key is widely distributed, only the private key can unlock the encrypted messages. The design of asymmetric encryption allows for secure communication without the need to share a single secret key between parties, making it a popular choice for secure internet communications such as SSL/TLS protocols used in our web browsers. The use of two distinct keys helps prevent unauthorized access and ensures that only the intended recipient can read the message.