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Encryption scrambles a message's contents to restrict access to specific individuals. There are two main types: symmetric and asymmetric encryption. Symmetric encryption requires both parties to share a secret key, which can pose challenges in securely transmitting the key. For example, Alice wants to share a sensitive document with Bob, encrypts it with a chosen passphrase, and sends it. However, Bob cannot access the document without this passphrase. The dilemma arises when Alice needs to share the passphrase safely, as sending it via email could expose it to potential interception by others. This challenge highlights the limitations of symmetric encryption, necessitating the development of asymmetric encryption.