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Protecting text messages from hackers and eavesdroppers is crucial, though governments sometimes seek access for criminal investigations. Tech companies argue this poses privacy risks. Text messages use end-to-end encryption to maintain privacy while in transit. When sending a secure message, each smartphone employs two unique keys: a public key, which is shared for encryption, and a private key, kept confidential on the device. To chat securely, two users combine their public and private keys to create a temporary shared key for encryption.