Jian Guo

My name is Jian Guo, I am currently an Associate Professor (with tenure) with School of Physical and Mathematical Sciences, Nanyang Technological University in Singapore. My research interests focus on cryptography, especially cryptanalysis, design and implementation of (lightweight) hash functions, block ciphers, authenticated encryption schemes, and their applications such as message authentication codes. As such, I head Cryptanalysis Taskforce at NTU, publish papers, give talks, and also actively serve the community. My team and I have won several open competitions on cryptanalysis on various symmetric-key cryptography standards.

I am constantly looking for PhD candidates (refer to this page) and Postdoc Research Fellows on both symmetric-key cryptography and privacy-preserving technologies, feel free to contact me for more information.

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Recent Services / Appointments

NTU

Head, Cryptanalysis Taskforce (since 2014)
Program Director (Co-Founder), Master of Science in Cyber Security (since 2022)

Adjunct Appointments

Adjunct Distinguished Young Professor, Shandong University (since 2024)

Research Community

IACR Board of Directors (since 2020), IACR Schools Committee (since 2022), IACR Test-of-Time Awards Committee 2023
Asiacrypt Steering Committee (since 2017)
Program Co-Chair, Asiacrypt 2023
General (Co-)Chair, Asiacrypt 2021, FSE 2013, ASK 2011 (co-founder)
Program Committee Member: Asiacrypt, Crypto, Eurocrypt, FSE since 2017, and ACM CCS since 2024
Invited Talks at CryptoIC 2024, Huawei STW 2023, ASK 2023, ChinaCrypt 2023, ADSC 2023, Asiacrypt 2022, FSE 2019, Inscrypt 2014, etc.

Government Agencies / Organizations

Security and Privacy Standards Technical Committee, Singapore (since 2017)
International Standards Organization (ISO), SC 27/WG2, Representative for Singapore (since 2017)
Panel of Experts for Enterprise Singapore (since 2024)

Industry

Consultant for Huawei (since 2023)
Consultant for LatticeX Foundation (since 2022)
Principal Investigator for collaborative R&D project with Paypal Inc (2021 - 2023)
Principal Investigator for collaborative R&D project with LatticeX Foundation (2022 - 2025)

Community

Secretary, Residents' Network, People's Association (since 2020)

Awards

Best Paper Awards: FSE 2018, ACISP 2022
NTU/SPMS Collaborative Research Award 2022 (Co-PI)
NTU/SPMS Young Researcher Award 2021
NTU Accelerating Creativity and Excellence Award 2020 (Co-PI)
Best Publication Awards by Temasek Labs@NTU 2015, 2016, 2017
Winner of The Keccak Crunchy Crypto Collision and Pre-image Contest, for several occasions in 2012~2019

Hiring

[2025/04] Several postdoc positions in all areas of cryptology jointly with Wuhan University, China (PI: Jie Chen) and NTU Singapore (myself) are available immediately. See here for more information.
[2024/08] There are several 2-year postdoc positions on Symmetric-Key Cryptography jointly by Tsinghua University, China (PI: Xiaoyang Dong) and NTU Singapore (myself) available immediately. See here for more information.
The Master of Science in Cyber Security program is now offered for every August intake.
To my potential PhD or Final Year Project students, refer to this page for information.

News

2024/08: Invited talk at CryptoIC 2024 on "An Overview on the Links between Cryptanalysis and Side-Channel Attacks".
2023/12: Invited talk at ASK 2023 and keynote talk at ChinaCrypt 2023 on "A Realistic Summary and Projection of Cryptanalysis"
2022/12: Invited talk at Asiacrypt 2022 on "Evolution of Cryptanalysis: Security Updates on SHA-3 and AES Hashing"
2022/11: Joint with L. Song and H. Wang, the paper entitled "Key Structures: Improved Related-Key Boomerang Attack against the Full AES-256" won the Best Paper Award of ACISP 2022. The paper improves the attack with lowest time complexity from 2^99 to 2^91 with the access to more related keys.
2022/04: Lanuch of Master of Science in Cyber Security.
2022/03/24: humbled to receive SPMS Young Reseacher Award 2021.
2022/02/14: News release by NTU/SPMS on the organization of Asiacrypt 2021.
2021/11/17: thanks to all for electing me to the IACR Board of Directors (Term 2022-2024), as promised I will do my best to promote research, education, and collaborations in the crypto community. References: the IACR 2021 Election and news release by NTU/SPMS.
2021/03: The first preimage attack against 8-round AES hashing: news release by NTU/CoS, eprint
2019/03: Invited talk at FSE 2019 on "Security of SHA-3 and Related Constructions"
2018-02-08: Joint with C. Chaigneau, T. Fuhr, H. Gilbert, J. Guo, J. Jean, J. R. Reinhard, L. Song, the paper entitled "Key-Recovery Attacks on Full Kravatte" won the Best Paper Award of FSE 2018. The paper broke the full Kravatte (a PRF design based on the SHA-3 round function), and several subsequent patched versions.

Education

01.2007 - 09.2010 Doctor of Mathematical Sciences School of Physical and Mathematical Sciences
PhD Supervisor: Huaxiong Wang Nanyang Technological University, Singapore

08.2003 - 11.2006 Bachelor of Engineering School of Computer Engineering
(with First Class Honors) Nanyang Technological University, Singapore
FYP Supervisor: Suiping Zhou

Employment

03.2013 - present Nanyang Technological University, Singapore
09.2010 - 02.2013 Institute for Infocomm Research, Singapore
01.2007 - 09.2010 Nanyang Technological University, Singapore

Teaching

Discrete Mathematics (Undergraduate): AY14/15 S2, AY15/16 S2, AY18/19 S1, AY19/20 S1, AY19/20 S2, AY20/21 S1, AY20/21 S2, AY21/22 S1, AY21/22 S2, AY22/23 S1, AY23/24 S1, AY24/25 S1
Algorithms and Computing II (Undergraduate): AY17/18 S2, AY18/19 S2
Blockchains and Cryptocurrency (MSc Cybersecurity): AY23/24 S1, AY24/25 S2
Topics in Crypto and Cyber Security (MSc Cybersecurity): AY23/24 S2, AY24/25 S2
Blockchain Privacy & Scalability (MSc Blockchain): AY23/24 S3

Contacts

Email: guojian [at] ntu.edu.sg
Address: School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371.

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