# android.security.keystore Added in[API level 23](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) # android.security.keystore *** ** * ** *** [Kotlin](https://developer.android.com/reference/kotlin/android/security/keystore/package-summary "View this page in Kotlin")\|Java ## Classes |------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [KeyGenParameterSpec](https://developer.android.com/reference/android/security/keystore/KeyGenParameterSpec) | [AlgorithmParameterSpec](https://developer.android.com/reference/java/security/spec/AlgorithmParameterSpec)for initializing a[KeyPairGenerator](https://developer.android.com/reference/java/security/KeyPairGenerator)or a[KeyGenerator](https://developer.android.com/reference/javax/crypto/KeyGenerator)of the[Android Keystore system](https://developer.android.com/training/articles/keystore). | | [KeyGenParameterSpec.Builder](https://developer.android.com/reference/android/security/keystore/KeyGenParameterSpec.Builder) | Builder of[KeyGenParameterSpec](https://developer.android.com/reference/android/security/keystore/KeyGenParameterSpec)instances. | | [KeyInfo](https://developer.android.com/reference/android/security/keystore/KeyInfo) | Information about a key from the[Android Keystore system](https://developer.android.com/training/articles/keystore). | | [KeyProperties](https://developer.android.com/reference/android/security/keystore/KeyProperties) | Properties of[Android Keystore](https://developer.android.com/training/articles/keystore)keys. | | [KeyProtection](https://developer.android.com/reference/android/security/keystore/KeyProtection) | Specification of how a key or key pair is secured when imported into the[Android Keystore system](https://developer.android.com/training/articles/keystore). | | [KeyProtection.Builder](https://developer.android.com/reference/android/security/keystore/KeyProtection.Builder) | Builder of[KeyProtection](https://developer.android.com/reference/android/security/keystore/KeyProtection)instances. | | [KeyStoreManager](https://developer.android.com/reference/android/security/keystore/KeyStoreManager) | This class provides methods for interacting with keys stored within the[Android Keystore](https://developer.android.com/privacy-and-security/keystore). | | [WrappedKeyEntry](https://developer.android.com/reference/android/security/keystore/WrappedKeyEntry) | An[Entry](https://developer.android.com/reference/java/security/KeyStore.Entry)that holds a wrapped key. | ## Exceptions |----------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------| | [BackendBusyException](https://developer.android.com/reference/android/security/keystore/BackendBusyException) | Indicates a transient error that prevented a key operation from being created. | | [KeyExpiredException](https://developer.android.com/reference/android/security/keystore/KeyExpiredException) | Indicates that a cryptographic operation failed because the employed key's validity end date is in the past. | | [KeyNotYetValidException](https://developer.android.com/reference/android/security/keystore/KeyNotYetValidException) | Indicates that a cryptographic operation failed because the employed key's validity start date is in the future. | | [KeyPermanentlyInvalidatedException](https://developer.android.com/reference/android/security/keystore/KeyPermanentlyInvalidatedException) | Indicates that the key can no longer be used because it has been permanently invalidated. | | [SecureKeyImportUnavailableException](https://developer.android.com/reference/android/security/keystore/SecureKeyImportUnavailableException) | Indicates that the Keystore does not support securely importing wrapped keys. | | [StrongBoxUnavailableException](https://developer.android.com/reference/android/security/keystore/StrongBoxUnavailableException) | Indicates that an operation could not be performed because the requested security hardware is not available. | | [UserNotAuthenticatedException](https://developer.android.com/reference/android/security/keystore/UserNotAuthenticatedException) | Indicates that a cryptographic operation could not be performed because the user has not been authenticated recently enough. | | [UserPresenceUnavailableException](https://developer.android.com/reference/android/security/keystore/UserPresenceUnavailableException) | Indicates the condition that a proof of user-presence was requested but this proof was not presented. | - ## Classes - [KeyGenParameterSpec](https://developer.android.com/reference/android/security/keystore/KeyGenParameterSpec) - [KeyGenParameterSpec.Builder](https://developer.android.com/reference/android/security/keystore/KeyGenParameterSpec.Builder) - [KeyInfo](https://developer.android.com/reference/android/security/keystore/KeyInfo) - [KeyProperties](https://developer.android.com/reference/android/security/keystore/KeyProperties) - [KeyProtection](https://developer.android.com/reference/android/security/keystore/KeyProtection) - [KeyProtection.Builder](https://developer.android.com/reference/android/security/keystore/KeyProtection.Builder) - [KeyStoreManager](https://developer.android.com/reference/android/security/keystore/KeyStoreManager) - [WrappedKeyEntry](https://developer.android.com/reference/android/security/keystore/WrappedKeyEntry) - ## Exceptions - [BackendBusyException](https://developer.android.com/reference/android/security/keystore/BackendBusyException) - [KeyExpiredException](https://developer.android.com/reference/android/security/keystore/KeyExpiredException) - [KeyNotYetValidException](https://developer.android.com/reference/android/security/keystore/KeyNotYetValidException) - [KeyPermanentlyInvalidatedException](https://developer.android.com/reference/android/security/keystore/KeyPermanentlyInvalidatedException) - [SecureKeyImportUnavailableException](https://developer.android.com/reference/android/security/keystore/SecureKeyImportUnavailableException) - [StrongBoxUnavailableException](https://developer.android.com/reference/android/security/keystore/StrongBoxUnavailableException) - [UserNotAuthenticatedException](https://developer.android.com/reference/android/security/keystore/UserNotAuthenticatedException) - [UserPresenceUnavailableException](https://developer.android.com/reference/android/security/keystore/UserPresenceUnavailableException)