• Program Chair: ISPEC 2017, ACISP 2016, rovSec 2014, Pairing 2015, Cryptographic Track of EIDWT 2013, ProvSec 2007 (the founder of ProvSec), Applied Cryptography and Information Security (ACIS) 2006

• Program Committee: CANS 2010, IWSEC 2010, IEEE TrustCom 2011, IWSEC 2011, ICICS 2012, ProvSec 2012, Inscrypt 2012, IEEE CloudCom 2012, IEEE TrustCom 2012, IEEE INCoS 2013, ProvSec 2013, IEEE TrustCom 2013, ISPEC 2014, NSS 2014, ISC 2014, ICICS 2014, TrustCom 2015, SSR 2015, SocialSec 2015, ProvSec 2015, LSNS 2015, ISPEC 2015, ICPADS 2015, CPSS 2015…..

• International Standardization Project Editor: International Standardization ISO/IEC JTC 1/SC 27 18033-5 Information technology -- Security techniques -- Encryption algorithms -- Part 5: Identity-based ciphers

• National Body Delegation: Represent Singapore (2010-2014) and Australia (2017- present) as national body expert delegates in the ISO/IEC JTC 1/SC 27 (IT Security techniques) standardization meeting

• Journal Editor:

• International Journal of Computer & Software Engineering
• KSII Transactions on Internet and Information Systems
• Soft Computing
• Guest Co-editors of Special Issue on “Security and Privacy in Mobile Clouds” of Pervasive and Mobile Computing (PMC); Guest Co-editors of Special Issue on “Provably Secure Cryptographic Solutions for Wireless Networks” of Security and Communication Networks (SCN); Guest Co-editors of Special Issue on “Next-Generation Trustworthy Applications of Distributed Sensor Networks” of International Journal of Distributed Sensor Networks.