Ramesh Nagappan is a security technologist and researcher who remains focused on technologies related to Cryptography, Identity Management, Cloud Infrastructure and IoT. Currently, he works as a Principal Security Engineer at Amazon within the Devices and Services Security organization. Previously, he worked for Oracle and Sun Microsystems in various security engineering roles. Ramesh is the co-author of Core Security Patterns (Prentice Hall) and five other books on Java security and programming. Ramesh serves as a research director and adjunct faculty at Harvard University, contributing to graduate programs in computer science. Ramesh holds Masters degrees in Industrial Automation from Indian Institute of Science, Bangalore and Applied Sciences with a concentration in Computer Science from Harvard University.