»Data Collection in the Investigative Process and Constitutional Restrictions«: Even under today's technology conditions authorization norms for data collection in criminal investigation should be designed according to the principles of clarity and proportionality. However, recent developments in Germany and South Korea have been overly skewed towards effective criminal investigation. New investigative measures should be actively accepted parallel to the change in reality, but at the same time, procedural controls to prevent excessive violation of character should also be secured.