What encryption algorithm is required by Google for all modern Android devices?
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Correct answer: AES 256.
Why this is the answer
AES 256 is the encryption algorithm required by Google for full-disk encryption on all modern Android devices. This ensures a high level of data security. SHA 256 is a hashing algorithm, used for data integrity and digital signatures, not encryption. AES 128 is an encryption algorithm, but AES 256 is the stronger, mandated standard for Android. HMAC (Hash-based Message Authentication Code) is used for message authentication, combining a cryptographic hash function with a secret key, but it's not an encryption algorithm itself.
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