Dalit Naor

Dalit Naor

Dean, School of Computer Science
The Academic College of Tel-Aviv-Yaffo

I’m a computer scientist working on storage systems and cloud. I'm the Dean of the School of Computer Science at the Academic College Tel-Aviv-Yaffo. I joined the college after spending a career at IBM Research as a senior technical staff member and a senior manager, where I worked on Cloud platforms and Storage systems. At IBM Almaden I developed technologies for Content Protection. In my past academic life, I worked on Bioinformatics and combinatorial optimization.

I did my PhD at the University of Californian Davis (with Prof. Dan Gusfield), and a postdoc at Stanford and Tel-Aviv University.

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Research

  • My current research area is Storage Systems, Cloud Storage and infrastructure for BigData. I worked on Cloud object stores (and its OSD origin), data deduplication and compression, cloud security and long term digital preservation. I have co-chaired, together with Ashvin Goel from the U. of Toronto, FAST 2023 - the major conference on storage systems.

  • In my Ph.D I worked on combinatorial optimization in the area of minimum cuts in graphs and graph augmentation problems

  • As a postdoc at Stanford University and Tel-Aviv University I applied optimization techniques to problems in bioinformatics, when the area was in its very early days. I characterized the optimal and sub-optimal alignments of DNA sequences and proteins.

  • I worked on a spectrum of security-related technologies, including internet security, content protection, storage security and cloud security. I devised optimization algorithms for the assignment of cryptographic keys to compliant devices; these algorithms form the basis for Content Protection / DRM technology protecting against illegal copying of content.



CPRM/CPPM Content Protection

Background: Back in 1999, distributed on-line services for digital audio have just emerged, and threated to disrupt the media...

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Background: Back in 1999, distributed on-line services for digital audio have just emerged, and threated to disrupt the media entertainment industry , e.g., the story of Napster. In response, Digital Right Management (DRM) technologies have been proposed to address this disruption and avoid copyright infringement.

CPRM/CPPM: At IBM Almaden Research Center we developed and deployed CPRM/CPPM, a technology for Content Protection for Recordable Media and Pre-Recorded Media for DVDs, protecting against illegal copying of content. We devised optimization algorithms for the assignment of cryptographic keys to compliant devices and other media. CPRM/CPPM is shipped today in a few types of media such as ATA drives and Secure Digital cards and is part of Advanced Access Content System (AACS) for HD-DVD and Blu-ray discs.

In a Crypto 2001 paper Revocation and Tracing Schemes for Stateless Receivers, Dalit Naor, Moni Naor, Jeffery Lotspiech, we laid the algorithmic foundation for an improvement over the original method. The technology was covered by patents, and the CPRM spec is published and available as an open specification.

Related Links:

Revocation and Tracing Schemes for Stateless Receivers Open Specifications

Object Storage

Backgroud: Data explosion is a major characteristic of our era. Back in 2003 at the Storage Systems research group at IBM we laid the foundation...

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Backgroud: Data explosion is a major characteristic of our era. Back in 2003 at the Storage Systems research group at IBM we laid the foundation for a new abstraction of storage called OSD (Object-based Storage Device) which, a few years later, evolved into Cloud object stores - the most popular cloud storage service today.

The OSD paradigm and T10 standard: We published many Systems/Storage papers over the past decade on the topic. The two early papers (i) Towards an object store (MSST 2003) and (ii) Object storage: The future building block for storage systems (MSST 2005) envisioned the foundation for the paradigm shift.

OSD was also standadized as an open ANSI standard. The OSD T10 standard “SCSI Object-Based Storage Device Commands (OSD)” was publisehd in 2006.

Related Links:

“SCSI Object-Based Storage Device Commands (OSD)” Cloud object stores The ANSI T10 object-based storage standard and current implementations

My current research area is Storage Systems, Cloud Storage and infrastructure for BigData.

Teachings

  • Seminar: Topics in Cloud-Based Architectures (1851450)

    Fall 2022 (Oct. 2022)

    A seminar for Masters students at the Academic College Tel-Aviv-Yaffo
    Seminar description
    Reading list and instructions

  • Advanced Storage Systems for Big Data (18103701)

    Fall 2021 (Oct. 2021)

    An undergrad course at the Academic College Tel-Aviv-Yaffo
    Course Syllabus

  • Advanced topics in Storage Systems for Big Data(18103701)

    Spring 2021 (Feb. 2021)

    A course for Masters students at the Academic College Tel-Aviv-Yaffo

  • Advanced Topics in Storage Systems for Big Data

    Spring 2014

    Masters Course @ Tel-Aviv University

  • Advanced Topics in Storage Systems

    Spring 2013

    Masters Course @ Tel-Aviv University

Publications

Cloud, Storage and Big Data

  • Too Big to Eat: Boosting Analytics Data Ingestion from Object Stores with Scoop, by Yosef Moatti, Eran Rom et al. In IEEE 33rd International Conference on Data Engineering (ICDE) 2017

  • Security intelligence for cloud management infrastructures, by Stefan Berger, et al. IBM Journal of Research and Development 60

  • Iostack: Software-defined object storage, by R Gracia-Tinedo et al, IEEE Internet Computing 20 (3), 10-18. (2016).

  • SDGen: Mimicking Datasets for Content Generation in Storage Benchmarks, by Raúl Gracia-Tinedo, Danny Harnik, Dalit Naor, Dmitry Sotnikov, Sivan Toledo and Aviad Zuck. FAST 2015.

  • Estimation of deduplication ratios in large data sets, by Danny Harnik, Oded Margalit, Dalit Naor, Dmitry Sotnikov and Gil Vernik. IEEE 28th Symposium on Mass Storage Systems and Technologies (MSST) 2012

  • A Cloud Environment for Data-intensive Storage Services, by E.K. Kolodner et al. IEEE International Conference on Cloud Computing Technology and Science (CloudCom) 2011

  • Low Power Mode in Cloud Storage Systems, by Danny Harnik, Dalit Naor and Itai Segall, The Fifth International Workshop on System Management Techniques, Processes, and Services (SMTPS 2009), Special Focus on Cloud Computing, col-located with IPDPS

  • Storage Modeling for Power Estimation, by Miriam Allalouf, Yuriy Arbitman, Michael Factor, Ronen Kat, Kalman Meth and Dalit Naor, SYSTOR 2009

  • Preservation DataStores: New storage paradigm for preservation environments. Simona Rabinovici-Cohen, Michael Factor, Dalit Naor, Leeat Ramati, Petra Reshef, Shahar Ronen, Julian Satran, David L. Giaretta. IBM Journal of Research and Development (52)

  • The ANSI T10 object-based storage standard and current implementations. David Nagle, Michael Factor, Sami Iren, Dalit Naor, Erik Riedel, Ohad Rodeh, Julian Satran. IBM Journal of Research and Development (52)

  • Capability based Secure Access Control to Networked Storage Devices. Michael Factor, Dalit Naor, Eran Rom, Julian Satran, Sivan Tal. MSST 2007

  • Preservation datastores: Architecture for preservation aware storage. Michael Factor, Dalit Naor, Simona Rabinovici-Cohen, Leeat Ramati, Petra Reshef, Julian Satran, David L Giaretta. MSST 2007

  • The need for preservation aware storage: a position paper. Michael Factor, Dalit Naor, Simona Rabinovici-Cohen, Leeat Ramati, Petra Reshef, Julian Satran. Operating Systems Review 2007.

  • Toward Securing Untrusted Storage without Public-Key Operations. Dalit Naor, Amir Shenhav, Avishai Wool. Proceedings of the 2005 ACM workshop on Storage security and survivability (StorageSS)

  • Object storage: The future building block for storage systems. Michael Factor, Kalman Meth, Dalit Naor, Ohad Rodeh, Julian Satran. MSST 2005

  • The OSD Security Protocol. Michael Factor, David Nagle, Dalit Naor, Erik Riedel, Julian Satran. International IEEE Security in Storage Workshop (SISW) 2005

  • Towards an object store. A. Azagury et al. MSST 2003.

  • A two-layered approach for securing an object store network. Alain Azagury, Ran Canetti, Michael Factor, Shai Halevi, Ealan Henis, Dalit Naor, Noam Rinetzky, Ohad Rodeh, Julian Satran. International IEEE Security in Storage Workshop (SISW) 2002

Content Protection and Security

  • Revocation and Tracing Schemes for Stateless Receivers. Dalit Naor, Moni Naor, Jeffery Lotspiech. CRYPTO 2001

  • Protecting Cryptographic Keys: The Trace-and-Revoke Approach. Dalit Naor, Moni Naor. IEEE Computer, 2003

  • Clock synchronization with faults and recoveries. Boaz Barak, Shai Halevi, Amir Herzberg, and Dalit Naor. PODC, 2000

  • Access Control Meets Public Key Infrastructure, Or: Assigning Roles to Strangers. Amir Herzberg, Yosi Mass, Joris Mihaeli, Dalit Naor, Yiftach Ravid. IEEE Symposium on Security and Privacy 2000

  • The Proactive Security Toolkit and Applications. Boaz Barak, Amir Herzberg, Dalit Naor, Eldad Shai. ACM Conference on Computer and Communications Security 1999

  • Surf'N'Sign: Client Signatures on Web Documents, Amir Herzberg, Dalit Naor. IBM Systems Journal 1998

Bioinformatics

  • Interchanges of spatially neighbouring residues in structurally conserved environments. Einat Azarya-Sprinzak, Dalit Naor, Haim Wolfson and Ruth Nussinov. Protein Engineering, 1997

  • Amino Acid Pair Interchanges at Spatially Conserved Locations. Dalit Naor, Daniel Fischer, Robert L. Jernigan, Haim J. Wolfson and Ruth Nussinov. Journal of Molecular Biology, 1996

  • On Near-Optimal Alignments of Biological Sequences. Dalit Naor, Douglas L. Brutlag. Journal of Computational Biology , 1994

  • Parametric Optimization of Sequence Alignment. Dan Gusfield, K. Balasubramanian, Dalit Naor. SODA 1992. Also in Algorithmica, 1994

  • On suboptimal alignments of biological sequences. Dalit Naor, Douglas Brutlag. Annual Symposium on Combinatorial Pattern Matching, 1993

  • A Lower Bound on the Number of Solutions to the Probed Partial Digest Problem. Lee Newberg and Dalit Naor. Advances in Applied Mathematics, 1993

Combinatorial Optimization

  • A Fast Algorithm for Optimally Increasing the Edge Connectivity. Dalit Naor, Dan Gusfield, Charles Martel. FOCS 1990. Also, in SIAM J. Comput. 1997

  • Extracting Maximal Information About Sets of Minimum Cuts. Dan Gusfield, Dalit Naor. Algorithmica 1993

  • Efficient Algorithms for Generalized Cut Trees. Dan Gusfield, Dalit Naor. SODA 1990

  • Representing and enumerating edge connectivity cuts in RNC. Dalit Naor, Vijay V Vazirani. Workshop on Algorithms and Data Structures (1991)

  • Performance of Priority Queue Structures in a Virtual Memory Environment. Dalit Naor, Charles U. Martel, Norman S. Matloff. The Computer Journal, 1991

Popular Press

Academic Services

Miscellaneous

  • I am the mother of Yael, Efrat and Avner and married to Moni.

Contact

Send Mail +972-3-680-2332
  • School of Computer Science
  • Academic College Tel-Aviv-Yaffo
  • Weston Building 2, room #341
  • Rabenu Yeruham St.
  • P.O.B 8401 Yaffo
  • 6818211, Israel
The Academic College of Tel Aviv Yaffo

About the Academic College Tel-Aviv-Yaffo

The college is located at the heart of Yaffo. The School of Computer Science provides an excellence computer science academic education (B.Sc and M.Sc ) to about 1000 students, combining strong theoretical and fundamental education with cutting-edge practical training.
Its faculty are active researchers in diverse CS areas, while at the same time excel in high-quality teaching.
Its 5000 alumni are well positioned professionals in Israel's high-tech sector.
As the dean, I continuously work to strengthen our ties with the vibrant hi-tech ecosystem in Israel, while ensuring excellence and relevance of our academic program, making our school a leading program in Computer Science in Israel. We're hiring; for a faculty position opening check here