/**
 * Enum representing when a keychain item is accessible.
 */
export declare enum ACCESSIBLE {
    /** The data in the keychain item can be accessed only while the device is unlocked by the user. */
    WHEN_UNLOCKED = "AccessibleWhenUnlocked",
    /** The data in the keychain item cannot be accessed after a restart until the device has been unlocked once by the user. */
    AFTER_FIRST_UNLOCK = "AccessibleAfterFirstUnlock",
    /** The data in the keychain item can always be accessed regardless of whether the device is locked. */
    ALWAYS = "AccessibleAlways",
    /** The data in the keychain can only be accessed when the device is unlocked. Only available if a passcode is set on the device. Items with this attribute never migrate to a new device. */
    WHEN_PASSCODE_SET_THIS_DEVICE_ONLY = "AccessibleWhenPasscodeSetThisDeviceOnly",
    /** The data in the keychain item can be accessed only while the device is unlocked by the user. Items with this attribute do not migrate to a new device. */
    WHEN_UNLOCKED_THIS_DEVICE_ONLY = "AccessibleWhenUnlockedThisDeviceOnly",
    /** The data in the keychain item cannot be accessed after a restart until the device has been unlocked once by the user. Items with this attribute never migrate to a new device. */
    AFTER_FIRST_UNLOCK_THIS_DEVICE_ONLY = "AccessibleAfterFirstUnlockThisDeviceOnly"
}
/**
 * Enum representing access control options.
 */
export declare enum ACCESS_CONTROL {
    /** Constraint to access an item with either Touch ID or passcode. */
    USER_PRESENCE = "UserPresence",
    /** Constraint to access an item with Touch ID for any enrolled fingers. */
    BIOMETRY_ANY = "BiometryAny",
    /** Constraint to access an item with Touch ID for currently enrolled fingers. */
    BIOMETRY_CURRENT_SET = "BiometryCurrentSet",
    /** Constraint to access an item with the device passcode. */
    DEVICE_PASSCODE = "DevicePasscode",
    /** Constraint to use an application-provided password for data encryption key generation. */
    APPLICATION_PASSWORD = "ApplicationPassword",
    /** Constraint to access an item with Touch ID for any enrolled fingers or passcode. */
    BIOMETRY_ANY_OR_DEVICE_PASSCODE = "BiometryAnyOrDevicePasscode",
    /** Constraint to access an item with Touch ID for currently enrolled fingers or passcode. */
    BIOMETRY_CURRENT_SET_OR_DEVICE_PASSCODE = "BiometryCurrentSetOrDevicePasscode"
}
/**
 * Enum representing authentication types.
 */
export declare enum AUTHENTICATION_TYPE {
    /** Device owner is going to be authenticated by biometry or device passcode. */
    DEVICE_PASSCODE_OR_BIOMETRICS = "AuthenticationWithBiometricsDevicePasscode",
    /** Device owner is going to be authenticated using a biometric method (Touch ID or Face ID). */
    BIOMETRICS = "AuthenticationWithBiometrics"
}
/**
 * Enum representing security levels.
 * @platform Android
 */
export declare enum SECURITY_LEVEL {
    /** Requires for the key to be stored in the Android Keystore, separate from the encrypted data. */
    SECURE_SOFTWARE,
    /** Requires for the key to be stored on a secure hardware (Trusted Execution Environment or Secure Environment).
     * Read this article for more information: https://developer.android.com/privacy-and-security/keystore#ExtractionPrevention
     * */
    SECURE_HARDWARE,
    /** No security guarantees needed (default value). Credentials can be stored in FB Secure Storage. */
    ANY
}
/**
 * Enum representing types of biometric authentication supported by the device.
 */
export declare enum BIOMETRY_TYPE {
    /** Device supports authentication with Touch ID.
     * @platform iOS
     */
    TOUCH_ID = "TouchID",
    /** Device supports authentication with Face ID.
     * @platform iOS
     */
    FACE_ID = "FaceID",
    /** Device supports authentication with Optic ID.
     *  @platform visionOS
     */
    OPTIC_ID = "OpticID",
    /** Device supports authentication with Fingerprint.
     * @platform Android
     */
    FINGERPRINT = "Fingerprint",
    /** Device supports authentication with Face Recognition.
     * @platform Android
     */
    FACE = "Face",
    /** Device supports authentication with Iris Recognition.
     * @platform Android
     */
    IRIS = "Iris"
}
/**
 * Enum representing cryptographic storage types for sensitive data.
 *
 * Security Level Categories:
 *
 * 1. High Security (Biometric Authentication Required):
 * - AES_GCM: For sensitive local data (passwords, personal info)
 * - RSA: For asymmetric operations (signatures, key exchange)
 *
 * 2. Medium Security (No Authentication):
 * - AES_GCM_NO_AUTH: For app-level secrets and cached data
 *
 * 3. Legacy/Deprecated:
 * - AES_CBC: Outdated, use AES_GCM_NO_AUTH instead
 *
 * @platform Android
 */
export declare enum STORAGE_TYPE {
    /**
     * AES encryption in CBC (Cipher Block Chaining) mode.
     * Provides data confidentiality without authentication.
     * @deprecated Use AES_GCM_NO_AUTH instead.
     */
    AES_CBC = "KeystoreAESCBC",
    /**
     * AES encryption in GCM (Galois/Counter Mode).
     * Provides both data confidentiality and authentication.
     */
    AES_GCM_NO_AUTH = "KeystoreAESGCM_NoAuth",
    /**
     * AES-GCM encryption with biometric authentication.
     * Requires user authentication for both encryption and decryption operations.
     */
    AES_GCM = "KeystoreAESGCM",
    /**
     * RSA encryption with biometric authentication.
     * Uses asymmetric encryption and requires biometric authentication.
     */
    RSA = "KeystoreRSAECB"
}
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