public async Task KeyExchangeUtility_EncryptAndCompress_DecompressAndDecrypt_IdenticalAfterwards()
        {
            const string TEST_PW = "test.@#°§çUserPassword$$$__ bvgcgfc-jgvgch-67554-hjvghcv _69420  \r\n847KWdHfhoö\nüä!\t!]]   [}  \r\n\r\n $äö\"";
            string       i       = await keyExchange.EncryptAndCompressPrivateKeyAsync(privateKeyPem, TEST_PW);

            string o = await keyExchange.DecompressAndDecryptPrivateKeyAsync(i, TEST_PW);

            Assert.Equal(privateKeyPem, o);
        }