Publications

Standards, Specifications, and Technical Reports

• C. Aguilar-Melchor, T. Feneuil, N. Gama, S. Gueron, J. Howe, D. Joseph, A. Joux, E. Persichetti, T. H. Randrianarisoa, M. Rivain, and D. Yue. “SDitH”. Technical report, National Institute of Standards and Technology, 2025. available at https://csrc.nist.gov/Projects/pqc-dig-sig/round-2-additional-signatures. [Project page]
• C. Aguilar-Melchor, T. Feneuil, N. Gama, S. Gueron, J. Howe, D. Joseph, A. Joux, E. Persichetti, T. H. Randrianarisoa, M. Rivain, and D. Yue. “SDitH”. Technical report, National Institute of Standards and Technology, 2023. available at https://csrc.nist.gov/Projects/pqc-dig-sig/round-1-additional-signatures. [Project page]

Blog Posts

• G. Wattiau, J. Howe, and S. Guasch. “How a vulnerability found by AQtive Guard in HP’s software led to a fast, collaborative fix, and shows why cryptographic visibility matters.”. July 30, 2025.
• C. Aguilar-Melchor and J. Howe. “New PQC Standards Set to Transform Cybersecurity”. August 13, 2024.
• J. Howe and D. Joseph. “Cybersecurity Chronicles: RWPQC to RSA”. June 03, 2024.
• J. Howe and D. Nguyen. “How to Build Secure Tunnels with Sandwich in Python”. December 19, 2023.
• J. Howe. “Sandwich: An Open-Source Modern Cryptography Library”. August 08, 2023. [Project page]
• N. Bindel and J. Howe. “Batch Me if You Can”. May 02, 2023.
• J. Howe and S. Yue. “Adventures in PQC: Exploring Kyber in Python - Part I”. November 30, 2022.
• N. Bindel, J. Howe, and M. Manzano. “Recent Updates in PQC and Why We Should Learn to Love Cryptanalysis”. September 20, 2022.
• J. Howe and D. Joseph. “Standing Room Only for SandboxAQ at DEFCON30”. May 24, 2022.

Journal and Conference Papers

This may not be a comprehensive list. See Google Scholar for up-to-date and complete publications.

2025

• Albrecht, M. R., Gama, N., Howe, J., Narayanan, A. K., 2025. “Post-Quantum Online/Offline Signatures”. CT-RSA 2025. [Project page]

2024

• S. Deshpande, J. Howe, J. Szefer, and D. Yue, 2024, September. “SDitH in Hardware”. IACR Transactions on Cryptographic Hardware and Embedded Systems, 2024(2). [Project page]

• Aguilar-Melchor, C., Albrecht, M. R., Bailleux, T., Bindel, N., Howe, J., Hülsing, A., Joseph, D., and Manzano, M., 2023. “Batch Signatures, Revisited”. CT-RSA 2024.

2023

• Aguilar-Melchor, C., Gama, N., Howe, J., Hülsing, A., Joseph, D. and Yue, D., 2023. “The Return of the SDitH”. IACR EUROCRYPT 2023.

• Howe, J. and Westerbaan, B., 2022, March. “Benchmarking and Analysing the NIST PQC Finalist Lattice-Based Signature Schemes on the ARM Cortex M7”. AFRICACRYPT 2023. [Project page]

2022

• Howe, J. and Westerbaan, B., 2022, November. “Benchmarking and Analysing NIST PQC Lattice-Based Signature Scheme Standards on the ARM Cortex M7”. NIST Fourth PQC Conference, Virtual.

• Aguilar-Melchor, C., Deneuville, J.-C., Dion, A., Howe, J., Malmain, R., Migliore, V., Nawan, M., Nawaz, K., 2022, October. “Towards Automating Cryptographic Hardware Implementations: a Case Study of HQC”. CBCrypto 2022.

2021

• Howe, J., Prest, T., and Apon, D., 2021, May. “SoK: How (not) to Design and Implement Post-Quantum Cryptography”. In: CT-RSA. LNCS. Springer, Heidelberg.

• Howe, J., Martinoli, M., Oswald, E., and Regazzoni, F. “Exploring Parallelism to Improve the Performance of FrodoKEM in Hardware”. Journal of Cryptographic Engineering (2021). https://doi.org/10.1007/s13389-021-00258-7

2020

• Howe, J., Prest, T., Ricosset, T., Rossi, M., 2020, April. “Isochronous Gaussian Sampling: From Inception to Implementation”. Post-Quantum Cryptography - 11th International Conference, PQCrypto 2020, Paris, France, April 15-17, 2020 Revised Selected Papers. [Project page]

2019

• Howe, J., Martinoli, M., Oswald, E., Regazzoni, F., 2019, August. “Optimised lattice-based key encapsulation in hardware”. NIST’s Second PQC Standardization Conference 2019, 13.

• Ravi, P., Jhanwar, M. P., Howe, J., Chattopadhyay, A., and Bhasin, S., 2019, July. “Exploiting Determinism in Lattice-based Signatures: Practical Fault Attacks on pqm4 Implementations of NIST Candidates”. In Proceedings of the 2019 ACM Asia Conference on Computer and Communications Security (Asia CCS ‘19). ACM, New York, NY, USA, 427-440. [Project page]

• Howe, J., Khalid, A., Martinoli, M., Regazzoni, F., and Oswald, E., 2019, May. “Fault Attack Countermeasures for Error Samplers in Lattice-Based Cryptography”. In 2019 IEEE International Symposium on Circuits and Systems (ISCAS). IEEE.

2018

• Howe, J., Oder, T., Krausz, M., and Güneysu, T., 2018, September. “Standard Lattice-Based Key Encapsulation on Embedded Devices”. IACR Transactions on Cryptographic Hardware and Embedded Systems, 2018(3), pp.372-393.

• Khalid, A., Howe, J., Rafferty, C., Regazzoni, F., and O’Neill, M., 2018, May. “Compact, Scalable, and Efficient Discrete Gaussian Samplers for Lattice-Based Cryptography”. In 2018 IEEE International Symposium on Circuits and Systems (ISCAS), pp. 1-5. IEEE.

• Khalid, A., Rafferty, C., Howe, J., Brannigan, S., Liu, W. and O’Neill, M., 2018, October. “Error Samplers for Lattice-Based Cryptography - Challenges, Vulnerabilities, and Solutions”. In 2018 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS), pp. 411-414. IEEE.

• Fan, S., Liu, W., Howe, J., Khalid, A., and O’Neill, M., 2018, October. “Lightweight Hardware Implementation of R-LWE Lattice-Based Cryptography”. In 2018 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS), pp. 403-406. IEEE. [PDF]

2017 (PhD Thesis)

• Howe, J., 2017, August. “Practical Lattice-Based Cryptography in Hardware”. PhD thesis at the School of Electronics, Electrical Engineering, and Computer Science, Queen’s University Belfast.

2017

• Howe, J. and O’Neill, M., 2017, July. “GLITCH: A Discrete Gaussian Testing Suite For Lattice-Based Cryptography”. In Proceedings of the 14th International Joint Conference on e-Business and Telecommunications (ICETE 2017): SECRYPT, Madrid, Spain. [Project page]

• Howe, J., Rafferty, C., Khalid, A., and O’Neill, M., 2017, May. “Compact and provably secure lattice-based signatures in hardware”. In 2017 IEEE International Symposium on Circuits and Systems (ISCAS), pp. 1-4. IEEE.

2016

• Howe, J., Khalid, A., Rafferty, C., Regazzoni, F., and O’Neill, M., 2016. “On practical discrete Gaussian samplers for lattice-based cryptography”. IEEE Transactions on Computers.

• Khalid, A., Howe, J., Rafferty, C., and O’Neill, M., 2016, December. “Time-independent discrete Gaussian sampling for post-quantum cryptography”. In 2016 International Conference on Field-Programmable Technology (FPT), pp. 241-244. IEEE.

• Howe, J., Moore, C., O’Neill, M., Regazzoni, F., Güneysu, T., and Beeden, K., 2016, June. “Lattice-based encryption over standard lattices in hardware”. In Proceedings of the 53rd Annual Design Automation Conference (DAC), pp. 162. ACM.

• O’Neill, M., O’Sullivan, E., McWilliams, G., Saarinen, M.J., Moore, C., Khalid, A., Howe, J., Del Pino, R., Abdalla, M., Regazzoni, F., and Valencia, F., 2016, May. “Secure architectures of future emerging cryptography SAFEcrypto”. In Proceedings of the ACM International Conference on Computing Frontiers, pp. 315-322. ACM.

2015

• Howe, J., Pöppelmann, T., O’Neill, M., O’Sullivan, E., and Güneysu, T., 2015. “Practical Lattice-based Digital Signature Schemes”. ACM Transactions on Embedded Computing Systems (TECS), 14(3), p.41.