What is meant by anti-spoofing in GPS technology?

Anti-spoofing in GPS technology refers to using encrypted codes to prevent unauthorized GPS use. This security measure is designed to ensure that the signals received by GPS devices originate from legitimate satellites and cannot be easily replicated or mimicked by malicious entities. Spoofing occurs when someone transmits fake signals to mislead a GPS receiver, potentially leading it to provide incorrect location information. By implementing anti-spoofing techniques, the integrity and reliability of GPS signals are maintained, ensuring that users receive accurate positioning information and that the system remains secure against interference or fraudulent activities.

In comparison to the other concepts, enhancing accuracy through additional codes focuses more on improving the precision of location data rather than securing it. Providing open access to GPS data contradicts the purpose of anti-spoofing, as it would facilitate unauthorized use. Enhancing satellite visibility relates to the ability of GPS devices to receive signals from satellites effectively and does not directly address the security aspects involved in preventing spoofing.