A Method based on Hash Table to Implement the NAS Layer Decryption in LTE Big Data Platform

摘要

Firstly, this paper introduces the overall framework and design ideas of LTE big data platform. Secondly, it describes the principles of decrypting encrypted data. In view of the distribution characters of keys required by NAS layer decryption, a decryption scheme for analysis and implementation based on the data structure of hash bucket is proposed. Finally, this scheme is validated and analyzed. Aiming to studying decryption scheme of NAS date, applying this scheme to analyze the LTE big data platform and implementing the function of encrypt the NAS PDU in LTE big data platform. The scheme has a good application value in the field of network testing and a great signification to the operation and maintenance of LTE big data platform.