Encrypting data in transit converts readable plaintext into ciphertext. Anyone who captures the traffic will see only encrypted data, which is unintelligible without the correct decryption key. Thus, encryption safeguards the confidentiality of the information. By itself, encryption does not guarantee availability, non-repudiation, or full integrity-additional mechanisms such as MACs or digital signatures are required for those properties.
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What is the difference between confidentiality and integrity in network security?
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What role does a decryption key play in maintaining confidentiality?
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How do additional mechanisms like MACs or digital signatures ensure integrity or non-repudiation?