Christopher Wiraatmaja is an Assistant Professor at Nara Institute of Science and Technology, specializing in cryptography and privacy-preserving technology in blockchain. His recent research focuses on the development of scalable blockchain-based access control solutions for IoT devices, utilizing zero-knowledge proofs and state-of-the-art cryptographic primitives to provide robust and secure protocol. He speaks native-level Indonesian, fluent English, and everyday conversation-level Japanese.