I am new to iOS development, and recently I was trying to build an application, which will create a key inside the secure element, and after - I will sing something with it. While developing I've encountered an issue: the key generation fails if there is a flag .biometryAny or .biometryCurrentSet The authentication itself is triggered, but the function still throws a mistake. My setup - Xcode iPhone15 simulator, FaceID enrolled and the animation of it is working. Ive created the same post on overflow, in case somebody will have the same issues: https://stackoverflow.com/questions/78175858/secure-enclave-key-generation-failure I've tried deleting the flag, while keeping the manual authorisation, and this approach works, but I still would like have maximum security. THIS WORKS: func authenticateUser(completion: @escaping (Bool, Error?) -> Void) { let context = LAContext() var error: NSError? if context.canEvaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, error: &error) { let reason = "Biometric authentication is needed to access your secure data." context.evaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, localizedReason: reason) { success, authenticationError in DispatchQueue.main.async { completion(success, authenticationError) } } } else { // Biometry is not available or not enrolled. DispatchQueue.main.async { completion(false, error) } } } @objc func encryptAction() { authenticateUser { [weak self] (success, error) in guard success else { self?.outputLabel.text = "Authentication failed: \(error?.localizedDescription ?? "Unknown error")" return } guard let randomNumber = self?.inputTextField.text, !randomNumber.isEmpty, let dataToSign = randomNumber.data(using: .utf8), let privateKey = self?.generatePrivateKey() else { self?.outputLabel.text = "Error: Could not generate private key." return } if let signature = self?.signData(privateKey: privateKey, data: dataToSign) { self?.outputLabel.text = "Signature: \(signature.base64EncodedString())" } else { self?.outputLabel.text = "Error: Could not sign data." } } } func generatePrivateKey() -> SecKey? { // 1. Create Keys Access Control guard let accessControl = SecAccessControlCreateWithFlags( nil, kSecAttrAccessibleWhenUnlockedThisDeviceOnly, [.privateKeyUsage], nil) else { fatalError("cannot set access control") } // 2. Create Key Attributes guard let tag = "com.example.keys.mykey".data(using: .utf8) else { fatalError("cannot set tag") } let attributes: [String: Any] = [ kSecAttrKeyType as String: kSecAttrKeyTypeECSECPrimeRandom, kSecAttrKeySizeInBits as String: 256, kSecAttrTokenID as String: kSecAttrTokenIDSecureEnclave, kSecPrivateKeyAttrs as String: [ kSecAttrIsPermanent as String: true, kSecAttrApplicationTag as String: tag, kSecAttrAccessControl as String: accessControl ] ] // 3. Generate Key Pairs var error: Unmanaged<CFError>? guard let privateKey = SecKeyCreateRandomKey(attributes as CFDictionary, &error) else { if let error = error?.takeRetainedValue() { print("Error creating a key: \(error)") } return nil } return privateKey } func signData(privateKey: SecKey, data: Data) -> Data? { let digest = sha256(data: data) var error: Unmanaged<CFError>? guard let signature = SecKeyCreateSignature(privateKey, .ecdsaSignatureMessageX962SHA256, digest as CFData, &error) as Data? else { print(error!.takeRetainedValue() as Error) return nil } return signature } } THIS DOESN'T guard let accessControl = SecAccessControlCreateWithFlags( nil, kSecAttrAccessibleWhenUnlockedThisDeviceOnly, [.privateKeyUsage, .biometryCurrentSet], nil) else { info.something file is updated and there is a privacy FaceID field included. the error is triggered at this part: var error: Unmanaged<CFError>? guard let privateKey = SecKeyCreateRandomKey(attributes as CFDictionary, &error) else { if let error = error?.takeRetainedValue() { print("Error creating a key: \(error)") } return nil } The error itself: Error creating a key: Error Domain=NSOSStatusErrorDomain Code=-25293 "Key generation failed, error -25293" UserInfo={numberOfErrorsDeep=0, NSDescription=Key generation failed, error -25293}