ECManager

        static let keypair: EllipticCurveKeyPair.Manager = {
            EllipticCurveKeyPair.logger = { print($0) }
            let publicAccessControl = EllipticCurveKeyPair.AccessControl(protection: kSecAttrAccessibleAfterFirstUnlock, flags: []) // QUA: kSecAttrAccessibleAlways
            let privateAccessControl = EllipticCurveKeyPair.AccessControl(protection: kSecAttrAccessibleAfterFirstUnlock, flags: [.privateKeyUsage]) // QUA: kSecAttrAccessibleAlways
            let config = EllipticCurveKeyPair.Config(
                publicLabel: "no.agens.encrypt.public",
                privateLabel: "no.agens.encrypt.private",
                operationPrompt: "",
                publicKeyAccessControl: publicAccessControl,
                privateKeyAccessControl: privateAccessControl,
                token: .secureEnclaveIfAvailable)
            return EllipticCurveKeyPair.Manager(config: config)
        }()