B. A strong password.
Disk encryption protects data at rest by encrypting the entire disk or volume. However, encryption alone is not sufficient; a strong password (or passphrase) is necessary to protect the encryption key and ensure that only authorized users can access the encrypted data. This combination enhances security by preventing unauthorized access to the encrypted data.
You can use digital signatures to authenticate data stored on an encrypted disk. For example, you could digitally sign important files or system configurations stored on an encrypted disk. This helps ensure that even if an attacker gains access to the encrypted data, they cannot modify the data without detection.
That is incorrect, disk encryption is based on symmetric encryption and not public key cryptography. Digital certificate is a technology that uses public key cryptography.
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