An organization needs to protect sensitive data and confirm that associated metadata remains intact. Which method provides these assurances through a single encryption and authentication process?
A simple combination of symmetric encryption and a checksum over the entire message
A one-pass stream method that encrypts bits sequentially and stores a separate keyed hash
An integrated mode based on Galois operations that encrypts and checks integrity at once
A chained block approach that handles data encryption in segments without a validation tag
Authenticated encryption modes like AES-GCM ensure both confidentiality and integrity in one pass. They securely encrypt data and validate associated metadata using built-in tags. Other approaches, such as chaining block ciphers or adding checksums, lack integrated validation and leave systems vulnerable to tampering or manipulation.
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What is AES-GCM, and why is it used for authenticated encryption?
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How does AES-GCM differ from traditional encryption modes like CBC (Cipher Block Chaining)?
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What is metadata in the context of AES-GCM, and how is it protected?