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Encryption scrambles a message's contents, making it accessible only to certain individuals. There are two types of encryption: symmetric and asymmetric. In symmetric encryption, Alice encrypts a sensitive document with a chosen password and sends it to Bob. However, Bob cannot access the document without this passphrase, leading to a problem: how can Alice securely share the passphrase with him? Sending it via email is risky, as others may intercept it and decrypt their messages. This challenge illustrates the limitations of symmetric encryption and highlights the need for asymmetric encryption methods.