hard20 pts · first answer countsandroidsecurity

Decryption fails after new fingerprint

An app encrypts a token with a Keystore key that requires biometric authentication. After the user adds a new fingerprint, decryption fails with KeyPermanentlyInvalidatedException. Why?

A.All Keystore keys expire automatically after 30 daysB.New biometric enrollment invalidates such keys by defaultC.The token was stored in the wrong app folderD.Adding a fingerprint deletes all app data

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Decryption fails after new fingerprint

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