Statistical detection involves collecting data over time to define what is considered normal behavior or legitimate data for users or systems. It then uses statistical analysis to identify abnormal behavior that could indicate a security incident. Rule-based detection uses predefined rules or patterns that are based on known threats or vulnerabilities - it operates on an IF/THEN basis where if certain conditions are met then an alert is triggered. References := Cisco Cybersecurity Operations Fundamentals

Explanation
ROT13 is considered weak encryption and is not used with TLS (HTTPS:443). Source:
https://en.wikipedia.org/wiki/ROT13