public async Task NotSameTotp_OutOfTimeStep_Encrypted() { while (true) { if (DateTime.Now.Second % 5 == 0) { break; } await Task.Delay(800); } var totp = new Totp() .Secret(Key) .Length(8) .ValidFor(TimeSpan.FromSeconds(5)) .UseDefaultEncryptor(_aesKey, _aesIv); var value1 = totp.ComputeEncrypted(); var value1Dec = totp.Decrypt(value1); await Task.Delay(6000); var value2 = totp.ComputeEncrypted(); var value2Dec = totp.Decrypt(value2); Assert.AreNotEqual(value1Dec, value2Dec); }