Cybersecurity is of paramount importance in an increasingly pervasive digital world. Charles' cybersecurity research experience centers on the wireless mobile Internet. It covers both mobile devices at the edge network and servers in the IP-telecommunication core network.
Along with former colleagues at AT&T, Charles co-invented a series of US patented technologies to prevent security and privacy compromises for everyday mobile users.
Novel "verification service" that leverages various network entities to determine whether the information sender is authentic, allowing the network provider to identify the legitimate sender and protect the user from phishing attacks.
New app metadata analysis method for verifying mobile apps in order to prevent malicious apps from harming the users' devices.
Novel methods to reduce vulnerabilities of private virtual mobile networks, which allows users to access their home network when they connect via other remote networks
Multi-layers of deceptions such as honey servers, honey files, and honey databases to detect network intrusions
Server overload monitoring and detection methods to protect users from denial-of-service attacks
Charles also conducted one of the first comprehensive studies on secure Internet multimedia signaling performance evaluation and modeling for IP-based telecommunications networks. This work is a collaboration with researchers from both Columbia University and IBM, and was published at a top Computer Science Journal IEEE/ACM Transactions on Networking