Yuwei Zheng is a senior security researcher concentrated in embedded systems over 10 years. He reversed blackberry BBM, PIN, BIS push mail protocol, and decrypted the network stream successfully in 2011. He successfully implemented a MITM attack for Blackberry BES based on a modified ECMQV protocol of RIM. He focuses on the security issues of embedded hardware and IOT systems. He was the speaker of DEFCON 23, HITB 2016.