He has more than 20 years of research experience in cryptography and information security. He is author/co-author of 1 book, 12 edited books and over 250 papers in international journals and conferences, covering various areas in cryptography and information security such as message authentication codes, secret sharing schemes, signature schemes, hash functions, block ciphers, stream ciphers, secure multiparty computations, private information retrieval, fully homomorphic encryptions, post-quantum cryptography, code-based cryptography and lattice based cryptography. He has supervised over 50 PhD students and postdoctoral fellows, and has served on the editorial board of 9 international journals and as a member/chair of the program committee for more than 100 international conferences.

He received the inaugural Award of Best Research Contribution awarded by the Computer Science Association of Australasia in 2004 - the most prestigious award for mid-career computer scientists in Australia and New Zealand. He was one of the three invited speakers of ASIACRYPT 2017 – ASIACRYPT, CRYPTO and EUROCRYPT are the three flagship conferences of the International Association for Cryptologic Research.