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Encryption is the process of scrambling a message's contents to ensure that only certain individuals can access it. There are two types of encryption: symmetric and asymmetric. In symmetric encryption, a sender (Alice) uses a password to encrypt a document and sends it to a recipient (Bob). However, Bob cannot access the document without the passphrase, which creates a challenge: how can Alice securely share the passphrase with Bob? Sending it through email is risky as it could be intercepted by others, posing a security threat. This situation highlights the limitations of symmetric encryption, leading to the development of asymmetric encryption.
