We develop a vulnerability detection module to identify three important security vulnerabilities in the IMS system that supports 4G/5G multimedia services. We have validated them in 4 carriers from TaiwanU.S. using smartphones from 7 brands,shown that they can be exploited to launch a stealthy call DoS attack, a social engineering attack with ghost calls,a call ID spoofing attack. Moreover, attackers can detect attackable users using an AI technique with only the users＇ phone numbers. We finally propose solutionsdevelop an AI-based technique of call ID spoofing detection.

1. CDX is to provide an environment for long periods of time in coordination with school courses, including the simulation of a real company＇s network environment with randomly selected vulnerabilities in cyber defense contests. 2. HoneynetMalware Knowledge Base simulates systemapplication vulnerabilitiesthen monitors the cyber-attacksthe corresponding traffic flow.

"Introduce dielectric-fuse breakdown OTP (dFuse-OTP) technology: a.) dFuse is a newly discovered OTP mechanism which is totally different from the conventional mechanisms of anti-fuse, eFuse,charge-storage b.) IPs of dFuse OTPs have been protected globally c.) dFuse OTPs are totally integratedcompatible in the standard CMOS technologies without any additional masks d.) small layout celllow cost e.) dFuse OTPs have been at the phase of trial production in the first two big Taiwanese foundries."