Which term is described as an encryption key used by an app to send to a user to encrypt data?

• A. Promise
• B. Public Key
• C. Queue
• D. Quick Sort

Answer: (B)

Public key cryptography uses a pair of keys: a public key and a private key. The public key is shared openly so others can use it to encrypt data that only the owner can decrypt with their private key. In this scenario, the app provides the public key to the user, allowing the user to encrypt data securely for the intended recipient. This setup preserves confidentiality even if the data travels over insecure channels. The other terms refer to something else entirely: a promise handles asynchronous results, a queue is a data structure for ordering items, and quick sort is a sorting algorithm.