Research
- Cryptanalysis of symmetric-key primitive
- Developing new statistical attacks
I understand systems. Then I break them.
Projects
- STARK-friendly cryptographic primitives (https://www.esat.kuleuven.be/cosic/jarvis-and-friday-stark-friendly-cryptographic-primitives)
- New crypto design for Tor relay cells: https://lists.torproject.org/pipermail/tor-dev/2018-July/013279.html
Biography
I was born in 1983 and things mostly improved since.
Latest work
- New potentially interesting linear property for DES (https://eprint.iacr.org/2018/635)
- Embarrassing security vulnerability in high-end cars (https://www.wired.com/story/hackers-steal-tesla-model-s-seconds-key-fob/, https://www.esat.kuleuven.be/cosic/fast-furious-and-insecure-passive-keyless-entry-and-start-in-modern-supercars/)
Publications
| 1. |
S. D'haeseleer, "Hardware design for cryptanalysis," Master thesis, KU Leuven, T. Ashur, D. Sijacic, and I. Verbauwhede (promotors), 79 pages, 2019.
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| 2. | T. Ashur, O. Dunkelman, and N. Masalha, "Linear Cryptanalysis Reduced Round of Piccolo-80," In 3rd International Symposium on Cyber Security Cryptology and Machine Learning (CSCML 2019), Lecture Notes in Computer Science 11527, S. Dolev, D. Hendler, S. Lodha, and M. Yung (eds.), Springer-Verlag, pp. 16-32, 2019. |
| 3. | L. Wouters, E. Marin, T. Ashur, B. Gierlichs, and B. Preneel, "Fast, Furious and Insecure: Passive Keyless Entry and Start Systems in Modern Supercars," Transactions on Cryptographic Hardware and Embedded Systems 2019(3), pp. 66-85, 2019. |
| 4. | T. Ashur, S. Cancela, J. David Calle, I. Fernandez-Hernandez, V. Rijmen, and C. Sarto, "Toward an Operational Navigation Message Authentication Service: Proposal and Justification of Additional OSNMA Protocol Features," In , 6 pages, 2019. |
| 5. | T. Ashur, and A. Luykx, "An Account on the ISO/IEC Standardization of Simon and Speck," In Real World Crypto 2019, 2 pages, 2019. |
| 6. | T. Ashur, B. Gierlichs, E. Marin, B. Preneel, and L. Wouters, "Fast, Furious and Insecure: Passive Keyless Entry and Start Systems in Modern Supercars (Invited talk)," Real World Crypto, San Jose, CA, USA, 2019. |
| 7. | T. Ashur, M. Eichlseder, M. M. Lauridsen, G. Leurent, B. Minaud, Y. Rotella, Y. Sasaki, and B. Viguier, "Cryptanalysis of MORUS," In Advances in Cryptology - ASIACRYPT 2018, Lecture Notes in Computer Science, S. Galbraith, and T. Peyrin (eds.), Springer-Verlag, 26 pages, 2018. |
| 8. | T. Ashur, and A. Luykx, "An Account of the ISO/IEC Standardization of the Simon and Speck Block Cipher Families," In Security of Ubiquitous Computing Systems (Selected Topics), G. Avoine, and J. Hernandez-Castro (eds.), Springer-Verlag, pp. 47-64, 2018. |
| 9. | L. Wouters, E. Marin, T. Ashur, B. Gierlichs, and B. Preneel, "Fast, Furious and Insecure: Passive Keyless Entry and Start Systems in Modern Supercars," ESCAR EU 2018, Brussels, BE, 2018. |
| 10. | T. Ashur, S. Dhooghe, and V. Rijmen, "Jarvis and Friday---STARK-Friendly Cryptographic Primitives," Prepared at the request of StarkWare Industries, 15 pages, 2018. |
| 11. | T. Ashur, and R. Posteuca, "On Linear Hulls in One Round of DES," In BalkanCryptSec 2018, Lecture Notes in Computer Science, F. Laurentiu Tiplea, and B. Warinschi (eds.), Springer-Verlag, 11 pages, 2018. |
| 12. | T. Ashur, "Linear Cryptanalysis Using Low-Bias Approximations," Dagstuhl Seminar on Symmetric Cryptography, Dagstuhl, Germany, 2018. |
| 13. |
T. Ashur, "Cryptanalysis of Symmetric-Key Primitives," PhD thesis, KU Leuven, V. Rijmen (promotor), 214 pages, 2017.
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| 14. |
T. Ashur, J. Delvaux, S. Lee, P. Maene, E. Marin, S. Nikova, O. Reparaz, V. Rozic, D. Singelée, B. Yang, and B. Preneel, "A Privacy-Preserving Device Tracking System Using a Low-Power Wide-Area Network (LPWAN)," In 16th International Conference on Cryptology and Network Security, CANS 2017, Lecture Notes in Computer Science, Springer-Verlag, 22 pages, 2017.
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| 15. |
T. Ashur, G. De Witte, and Y. Liu, "An Automated Tool for Rotational-XOR Cryptanalysis of ARX-based Primitives," In Proceedings of the 38th Symposium on Information Theory in the Benelux, Werkgemeenschap voor Informatie- en Communicatietheorie, pp. 59-66, 2017.
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| 16. |
A. Ranea, Y. Liu, and T. Ashur, "An Easy-to-Use Tool for Rotational-XOR Cryptanalysis of ARX Block Ciphers," Proceedings of the Romanian Academy, Series A 18(3), pp. 307-316, 2017.
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| 17. |
T. Ashur, O. Dunkelman, and A. Luykx, "Boosting Authenticated Encryption Robustness with Minimal Modifications," In Advances in Cryptology - CRYPTO 2017, Lecture Notes in Computer Science, J. Katz, and H. Shacham (eds.), Springer-Verlag, pp. 3-33, 2017.
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| 18. |
T. Ashur, G. De Witte, Y. Liu, and A. Ranea, "Rotational-XOR Cryptanalysis of Reduced-round SPECK," IACR Transactions on Symmetric Cryptology 2017(3), pp. 24-36, 2017.
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| 19. |
G. De Witte, "Automatic SAT-solver Based Search Tools for Cryptanalysis," Master thesis, KU Leuven, T. Ashur, Y. Liu, and V. Rijmen (promotors), 61 pages, 2017.
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| 20. |
A. Ranea, "An Easy to Use Tool for Rotational-XOR Cryptanalysis of ARX Block Ciphers," Master thesis, KU Leuven, T. Ashur, Y. Liu, and V. Rijmen (promotors), 81 pages, 2017.
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