אור דונקלמן - הפקולטה למדעי המחשב והמידע

אודות▼

פרופ' אור דונקלמן הוא פרופ' מן המניין בחוג למדעי המחשב באוניברסיטת חיפה. נושאי המחקר שלו הם קריפטוגרפיה, עם דגש על קריפטאנליזה, פרטיות, עם דגש על מידע ביומטרי ואבטחת מידע. הוא שימש כראש תת המרכז לחקר הביומטריה ויישומיה הפועל במרכז חקר הסייבר, משפט ומדיניות באוניברסיטה (והוא ממייסדיו). הוא שימש כדירקטור בארגון הקריפטוגרפי הבינלאומי (IACR), וכן כנציג ישראל לועדות התקינה ISO/IEC SC27 WG2/WG3 (כמומחה אבטחת מידע וקריפטוגרפיה), והוא ממייסדי עמותת פרטיות ישראל. כיום הוא משמש כראש ועדת ההיגוי של הכנס Fast Software Encryption, וכן משמש כפרופ' אורח באוניברסיטה הטכנית של ברלין.

במהלך הקריירה האקדמית שלו, פרסם פרופ' דונקלמן מעל ל-130 מאמרים בכנסים וז'ורנלים בינלאומים, כולל הצגתן של שיטות קריפטאנליזה חדשות, התוצאות הטובות ביותר כנגד צפנים נפוצים (דוגמת ה-AES), וכן התקפות כנגד מנגנוני זיהוי ביומטרי. כחלק מעבודתו, הוא מהמפתחים של מספר שיטות הצפנה כגון HAIFA - שיטה ליצירת פונקציות תמצות קריפטוגרפיות, צפני הבלוקים KATAN ו-KTANTAN, וכן פונקציית התמצות SHAvite-3. הוא שימוש בכ-100 ועדת כנסים (כולל כנסים מובילים כגון EUROCRYPT, CRYPTO, ASIACRYPT ו-Usenix), וכ-6 פעמים כראש הועדה האקדמית (כולל EUROCRYPT 2022 ו-FSE 2009). פרופ' דונקלמן זכה במספר פרסים והכרות כגון פרס קריל (2014) ופרסי מאמר מצטיין (לדוגמא, בCRYPTO 2012 וב-FSE 2012).

פרסומים▼

New Attacks on Feistel Structures with Improved Memory Complexities, Dinur, I., Dunkelman, O., Keller, N., Ross, D. & Shamir, A., Apr 2026, In: Journal of Cryptology. 39, 2, 18.
Error Resilient Space Partitioning, Dunkelman, O., Geyzel, Z., Keller, C., Keller, N., Ronen, E., Shamir, A. & Tessler, R. J., Apr 2026, In: Discrete and Computational Geometry. 75, 3, p. 839-870 32 p.
A Simple Forgery Attack on Pelican, Dunkelman, O., 2026, Progress in Cryptology – LATINCRYPT 2025 - 9th International Conference on Cryptology and Information Security in Latin America, Proceedings. Escudero, D. & Damgård, I. (eds.). Springer Science and Business Media Deutschland GmbH, p. 333-344 12 p. (Lecture Notes in Computer Science; vol. 16129 LNCS).
Privacy - From the Ivory Tower to the Trenches in the Parliament, Dunkelman, O., 4 Jun 2025, CODASPY 2025 - Proceedings of the 15th ACM Conference on Data and Application Security and Privacy. Association for Computing Machinery, Inc, p. 1-4 4 p. (CODASPY 2025 - Proceedings of the 15th ACM Conference on Data and Application Security and Privacy).
Differential Cryptanalysis of the Reduced Pointer Authentication Code Function Used in Arm’s FEAT_PACQARMA3 Feature, Avanzi, R., Dunkelman, O. & Ghosh, S., 7 Mar 2025, In: IACR Transactions on Symmetric Cryptology. 2025, 1, p. 380-419 40 p.
Reconstructing Protected Biometric Templates from Binary Authentication Results, Rahimi, E., Osadchy, M. & Dunkelman, O., 2025, 2025 IEEE International Joint Conference on Biometrics, IJCB 2025. Institute of Electrical and Electronics Engineers Inc., (2025 IEEE International Joint Conference on Biometrics, IJCB 2025).
The Retracing Boomerang Attack, with Application to Reduced-Round AES, Dunkelman, O., Keller, N., Ronen, E. & Shamir, A., Jul 2024, In: Journal of Cryptology. 37, 3, 32.
Partial Sums Meet FFT: Improved Attack on 6-Round AES, Dunkelman, O., Ghosh, S., Keller, N., Leurent, G., Marmor, A. & Mollimard, V., 2024, Advances in Cryptology – EUROCRYPT 2024 - 43rd Annual International Conference on the Theory and Applications of Cryptographic Techniques, 2024, Proceedings. Joye, M. & Leander, G. (eds.). Springer Science and Business Media Deutschland GmbH, p. 128-157 30 p. (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); vol. 14651 LNCS).
Another Look at Differential-Linear Attacks, Dunkelman, O. & Weizman, A., 2024, Selected Areas in Cryptography - 29th International Conference, SAC 2022, Revised Selected Papers. Smith, B. & Wu, H. (eds.). Springer Science and Business Media Deutschland GmbH, p. 116-136 21 p. (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); vol. 13742 LNCS).
Quantum time/memory/data tradeoff attacks, Dunkelman, O., Keller, N., Ronen, E. & Shamir, A., Jan 2024, In: Designs, Codes, and Cryptography. 92, 1, p. 159-177 19 p.
Advanced Encryption Standard (AES), Boura, C. & Dunkelman, O., 1 Jan 2024, Symmetric Cryptography 1: Design and Security Proofs. wiley, p. 205-216 12 p.
Block Ciphers, Dunkelman, O., 1 Jan 2024, Symmetric Cryptography 1: Design and Security Proofs. wiley, p. 39-53 15 p.
The QARMAv2 Family of Tweakable Block Ciphers, Avanzi, R., Banik, S., Dunkelman, O., Eichlseder, M., Ghosh, S., Nageler, M. & Regazzoni, F., 19 Sep 2023, In: IACR Transactions on Symmetric Cryptology. 2023, 3, p. 25-73 49 p.
Deconstructing Alibaba Cloud's Preemptible Instance Pricing, Movsowitz Davidow, D., Agmon Ben-Yehuda, O. & Dunkelman, O., 7 Aug 2023, HPDC 2023 - Proceedings of the 32nd International Symposium on High-Performance Parallel and Distributed Computing. Association for Computing Machinery, Inc, p. 253-265 13 p. (HPDC 2023 - Proceedings of the 32nd International Symposium on High-Performance Parallel and Distributed Computing).
Attacking the IETF/ISO Standard for Internal Re-keying CTR-ACPKM, Dunkelman, O., Ghosh, S. & Lambooij, E., 10 Mar 2023, In: IACR Transactions on Symmetric Cryptology. 2023, 1, p. 41-66 26 p.
Tweakable SM4: How to tweak SM4 into tweakable block ciphers?, Guo, Z., Wang, G., Dunkelman, O., Pan, Y. & Liu, S., Feb 2023, In: Journal of Information Security and Applications. 72, 103406.
טכנולוגיית הבלוקצ׳יין – לא מה שחשבתם: שיקולים טכנולוגיים ומשפטיים, Translated title of the contribution: BLOCKCHAIN TECHNOLOGY - NOT WHAT YOU THOUGHT: TECHNOLOGICAL AND LEGAL CONSIDERATIONS⁨קן-דרור פלדמן, ד.⁩ & ⁨דונקלמן, א.⁩, 2023, In: דין ודברים: כתב-עת משפטי בין-תחומי. טז, 2, p. 511-556 46 p.
Practical Related-Key Forgery Attacks on Full-Round TinyJAMBU-192/256, Dunkelman, O., Ghosh, S. & Lambooij, E., 2023, In: IACR Transactions on Symmetric Cryptology. 2023, 2, p. 176-188 13 p.
Efficient Detection of High Probability Statistical Properties of Cryptosystems via Surrogate Differentiation, Dinur, I., Dunkelman, O., Keller, N., Ronen, E. & Shamir, A., 2023, Advances in Cryptology – EUROCRYPT 2023 - 42nd Annual International Conference on the Theory and Applications of Cryptographic Techniques, 2023, Proceedings. Hazay, C. & Stam, M. (eds.). Springer Science and Business Media Deutschland GmbH, p. 98-127 30 p. (Lecture Notes in Computer Science; vol. 14007 LNCS).
Practical-Time Related-Key Attack on GOST with Secret S-Boxes, Dunkelman, O., Keller, N. & Weizmann, A., 2023, Advances in Cryptology – CRYPTO 2023 - 43rd Annual International Cryptology Conference, CRYPTO 2023, Proceedings. Handschuh, H. & Lysyanskaya, A. (eds.). Springer Science and Business Media Deutschland GmbH, p. 177-208 32 p. (Lecture Notes in Computer Science; vol. 14083 LNCS).
Finding Collisions against 4-Round SHA-3-384 in Practical Time, Huang, S., Ben-Yehuda, O. A., Dunkelman, O. & Maximov, A., 9 Sep 2022, In: IACR Transactions on Symmetric Cryptology. 2022, 3, p. 239-270 32 p.
Sharp behavioral changes in preemptible instance pricing, Davidow, D. M., Ben-Yehuda, O. A. & Dunkelman, O., 6 Jun 2022, SYSTOR 2022 - Proceedings of the 15th ACM International Conference on Systems and Storage Conference. Association for Computing Machinery, Inc, p. 145 1 p. (SYSTOR 2022 - Proceedings of the 15th ACM International Conference on Systems and Storage Conference).
Preface, Dunkelman, O. & Dziembowski, S., 2022, In: Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics). 13275 LNCS, p. v-vi
Full Round Zero-Sum Distinguishers on TinyJAMBU-128 and TinyJAMBU-192 Keyed-Permutation in the Known-Key Setting, Dunkelman, O., Ghosh, S. & Lambooij, E., 2022, Progress in Cryptology – INDOCRYPT 2022 - 23rd International Conference on Cryptology in India, 2022, Proceedings. Isobe, T. & Sarkar, S. (eds.). Springer Science and Business Media Deutschland GmbH, p. 349-372 24 p. (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); vol. 13774 LNCS).
Practical key recovery attacks on FlexAEAD, Dunkelman, O., Eichlseder, M., Kales, D., Keller, N., Leurent, G. & Schofnegger, M., 2022, In: Designs, Codes, and Cryptography. 90, 4, p. 983-1007 25 p.
Biased differential distinguisher – Cryptanalysis of reduced-round SKINNY, Dunkelman, O., Huang, S., Lambooij, E. & Perle, S., Dec 2021, In: Information and Computation. 281, 104796.
Collaboration between government and research community to respond to covid-19: Israel’s case, Peleg, M., Reichman, A., Shachar, S., Gadot, T., Tsadok, M. A., Azaria, M., Dunkelman, O., Hassid, S., Partem, D., Shmailov, M., Yom-Tov, E. & Cohen, R., Dec 2021, In: Journal of Open Innovation: Technology, Market, and Complexity. 7, 4, 208.
Error resilient space partitioning, Dunkelman, O., Geyzel, Z., Keller, C., Keller, N., Ronen, E., Shamir, A. & Tessler, R. J., 1 Jul 2021, 48th International Colloquium on Automata, Languages, and Programming, ICALP 2021. Bansal, N., Merelli, E. & Worrell, J. (eds.). Schloss Dagstuhl- Leibniz-Zentrum fur Informatik GmbH, Dagstuhl Publishing, 4. (Leibniz International Proceedings in Informatics, LIPIcs; vol. 198).
Inverting Binarizations of Facial Templates Produced by Deep Learning (and Its Implications), Keller, D., Osadchy, M. & Dunkelman, O., 2021, In: IEEE Transactions on Information Forensics and Security. 16, p. 4184-4196 13 p., 9508363.
DNS-Morph: UDP-Based Bootstrapping Protocol for Tor, Ailabouni, R., Dunkelman, O. & Bitan, S., 2021, Cyber Security Cryptography and Machine Learning - 5th International Symposium, CSCML 2021, Proceedings. Dolev, S., Margalit, O., Pinkas, B. & Schwarzmann, A. (eds.). Springer Science and Business Media Deutschland GmbH, p. 244-265 22 p. (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); vol. 12716 LNCS).
Automatic Search for Bit-Based Division Property, Ghosh, S. & Dunkelman, O., 2021, Progress in Cryptology – LATINCRYPT 2021 - 7th International Conference on Cryptology and Information Security in Latin America, Proceedings. Longa, P. & Ràfols, C. (eds.). Springer Science and Business Media Deutschland GmbH, p. 254-274 21 p. (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); vol. 12912 LNCS).
Fuzzy Commitments Offer Insufficient Protection to Biometric Templates Produced by Deep Learning, Keller, D., Osadchy, M. & Dunkelman, O., 24 Dec 2020, In: IEEE Transactions on Information Forensics and Security.
Cryptanalysis of Feistel-Based Format-Preserving Encryption, Dunkelman, O., Kumar, A., Lambooij, E. & Sanadhya, S. K., 2020.
טכנולוגיית הבלוקצ'יין בישראל: שיבושים, שימושים, אתגרים וחסמים, Translated title of the contribution: Blockchain Techonology in Israel: Uses, Disruptions, Challenges, and BarriersLandau, G., Dunkelman, O., Rabinovich Einy, O., Gal, M., Shatov, T. & Yovel, J., 2020, 104 p.
It is All in the System’s Parameters: Privacy and Security Issues in Transforming Biometric Raw Data into Binary Strings, Osadchy, M. & Dunkelman, O., 1 Sep 2019, In: IEEE Transactions on Dependable and Secure Computing. 16, 5, p. 796-804 9 p.
A Simple Explanation for the Existence of Adversarial Examples with Small Hamming Distance, Shamir, A., Safran, I., Ronen, E. & Dunkelman, O., 30 Jan 2019, 19 p.
Qameleon v. 1.0, Avanzi, R., Banik, S., Bogdanov, A., DUNKELMAN, O., Huang, S. & Regazzoni, F., 2019, 56 p.
Progress in Cryptology – LATINCRYPT 2017, Lange, T. (Editor) & DUNKELMAN, O. (Editor), 2019, Springer. 428 p. (Lecture Notes in Computer Science)
HoneyFaces: Increasing the Security and Privacy of Authentication Using Synthetic Facial Images, Ohana, M., Dunkelman, O., Gibson, S. & Osadchy, M., 11 Nov 2016.
Preface, Dunkelman, O. & Sanadhya, S. K., 2016, In: Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics). 10095 LNCS, p. 5 1 p.
Collision attacks on up to 5 rounds of SHA-3 using generalized internal differentials, Dinur, I., Dunkelman, O. & Shamir, A., 2014, Fast Software Encryption - 20th International Workshop, FSE 2013, Revised Selected Papers. Springer Verlag, p. 219-240 22 p. (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); vol. 8424 LNCS).
The Lane hash function Extended Abstract, Indesteege, S., Andreeva, E., De Cannière, C., Dunkelman, O., Käsper, E., Nikova, S., Preneel, B. & Tischhauser, E., 2009, In: Dagstuhl Seminar Proceedings. 9031
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics): Preface, Dunkelman, O., 2009, In: Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics). 5665 LNCS, p. VI
The SHAvite-3 Hash Function, Biham, E. & Dunkelman, O., 2009, In: Dagstuhl Seminar Proceedings. 9031
Practical Attacks on NESHA-256, Dunkelman, O. & Bjørstad, T. E., 2009, In: IACR Cryptology ePrint Archive. 2009, 6 p.
A unified approach to related-key attacks, Biham, E., Dunkelman, O. & Keller, N., 2008, Fast Software Encryption - 15th International Workshop, FSE 2008, Revised Selected Papers. Springer Verlag, p. 73-96 24 p. (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); vol. 5086 LNCS).
A new attack on 6-round IDEA, Biham, E., Dunkelman, O. & Keller, N., 2007, Fast Software Encryption - 14th International Workshop, FSE 2007, Revised Selected Papers. Springer Verlag, p. 211-224 14 p. (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); vol. 4593 LNCS).
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics): Preface, Abe, M., Aoki, K., Ateniese, G., Avanzi, R., Beerliová, Z., Billet, O., Biryukov, A., Blake, I., Boyd, C., Brier, E., Castiglione, A., Cha, J., Chan, A., Chen, L., Cho, K., Contini, S., D'Arco, P., Ding, J., Doche, C. & Dunkelman, O. & 70 others, Fitzi, M., Fouque, P. A., Fournier, J. J. A., Fujisaki, K., Fujisaki, E., Furukawa, J., Galindo, D., Halevi, S., Handschuh, H., Heneghan, C., Holenstein, T., Hoshino, F., Hwang, Y. H., Isshiki, T., Jochemsz, E., Joux, A., Juels, A., Jutla, C., Kiayias, A., Kikuchi, H., Kobayashi, T., Kohno, T., Krawczyk, H., Kumar, S., Lange, T., Lee, J. W., Masucci, B., May, A., Mihaljevic, M., Minematsu, K., Monrose, F., Montague, P., Myers, S., Naccache, D., Nicolosi, A., Obana, S., Okazaki, S., Okeya, K., Olivier, F., Oyono, R., Page, D., Park, J. H., Peng, K., Pietrzak, K., Raub, D., Sakai, Y., Sakurai, K., Schindler, W., Seo, J. W., Shin, J. H., Shparlinski, I., Steinfeld, R., Szydlo, M., Kalai, Y. T., Teranishi, I., Tokita, T., Tunstall, M., Vercauteren, F., Villegas, K., Walfish, S., Wang, H., Wang, X., Warinschi, B., De Weger, B., Wolf, C., Yampolskiy, A., Yang, Y. H., Yin, Y. L., Yoon, J. & Pointcheval, D., 2006, In: Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics). 3960 LNCS, p. V-VI
Related-key boomerang and rectangle attacks, Biham, E., Dunkelman, O. & Keller, N., 2005, Advances in Cryptology - EUROCRYPT 2005: 24th Annual International Conference on the Theory and Applications of Cryptographic Techniques. Proceedings. Springer Verlag, p. 507-525 19 p. (Lecture Notes in Computer Science; vol. 3494).
Rectangle attacks on 49-round SHACAL-1, Biham, E., Dunkelman, O. & Keller, N., 2003, Fast Software Encryption 10th International Workshop, FSE 2003, Revised papers. Springer Verlag, p. 22-35 14 p. (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); vol. 2887).

השכלה▼

1997-2000 תואר ראשון במדעי המחשב (Summa Cum Laude) - טכניון
2000-2006 דוקטורט במדעי המחשב במסלול הישיר לדוקטורט - טכניון

רקע אקדמי▼

2006-2008 פוסט דוקטורט ב-KU Leuven, בלגיה
2008-2009 פוסט דוקטורט ב-Ecole Normale Superieure, פריז, צרפת
2009-2011 פוסט דוקטורט במכון וייצמן למדע, ישראל

תחומי מחקר▼

קריפטוגרפיה
קריפטנאליזה
הצפנת מפתח סימטרי - צפני בלוקים, שטף, פונקציות תמצות קריפטוגרפיות ו-MAC
פרטיות
ביומטריה
אבטחת מידע

פרסים▼

פרס קריל 2014
פרס מאמר מצטיין - CSCML 2020
פרס מאמר מצטיין - CRYPTO 2012
פרס מאמר מצטיין - FSE 2012
מלגת קלור לפוסט דוקטורנטים
מלגת France Telecom לפוסט-דוקטורנטים
מלגת רוטשילד לפוסט-דוקטורנטים
מלגת קלור לדוקטורנטים
תוכנית המצוינים הטכניונית