METHOD, APPARATUS, AND SYSTEM FOR USER PLANE SECURITY IN COMMUNICATION SYSTEM

Disclosed is a 6G communication system for achieving a high data transmission rate and a super-low latency time after 4G and 5G communication systems. According to various embodiments of the present disclosure, a method of selectively performing integrity protection or ciphering for data (for example, UP data, user data, or application data), an apparatus for performing the method, and a system for implementing embodiments are provided. According to an embodiment, a UP security procedure based on whether data is ciphered is provided. According to an embodiment, when confidentiality and integrity are provided for data, a packet structure for improving calculation efficiency is provided. Accordingly, an effect of reducing calculation resources and calculation time spent for enhancing security of data can be obtained by preventing already ciphered data from being overlappingly ciphered, and thus a more efficient communication system can be implemented.