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The Third NIST Workshop on Block Cipher Modes of Operation 2023


NIST will host the Third NIST Workshop on Block Cipher Modes of Operation on October 3-4, 2023, at the National Cybersecurity Center of Excellence in Rockville, Maryland. NIST hosted the two previous modes workshops in conjunction with the development of the Advanced Encryption Standard (AES) in the early 2000s.   

This workshop will discuss how NIST can best address the limitations of the block cipher modes of operation ("modes", for short) that are approved in the NIST Special Publication 800-38 series, which will be documented in an initial public draft of NIST Internal Report (NIST IR) 8459, Report on the Block Cipher Modes of Operation in the NIST SP 800-38 Series.

NIST is particularly interested in discussing the possibility of standardizing a tweakable wide block encryption technique that could support a large range of input lengths.  

Topics for discussion include: 

  • The security and efficiency of current NIST modes 
  • Additional security features (e.g., misuse-resistance, key commitment, etc.) that would be desirable in a new encryption technique
  • Case studies of encryption techniques for specific uses, such as storage and key wrapping
  • The security and efficiency of tweakable wide encryption techniques

NIST is also soliciting research and discussion papers, surveys, presentations, case studies, panel proposals, and participation from all interested parties. Submissions must be provided electronically in PDF format and sent to ciphermodes@nist.gov. NIST will post the accepted papers and presentations on the workshop website, though no formal proceedings will be published. 

Important dates 

  • Submission deadline: July 1, 2023
  • Notification deadline: July 30, 2023 
  • Hotel reservation deadline:  September 5, 2023  -- EXTENDED through September 11, 2023
  • Registration deadline: September 25, 2023 
  • Workshop: October 3-4, 2023 

Inquiries:  ciphermodes@nist.gov

Key Committing Security of AEZ
Yu Long Chen, Antonio Flórez-Gutiérrez, Akiko Inoue, Ryoma Ito, Tetsu Iwata, Kazuhiko Minematsu, Nicky Mouha, Yusuke Naito, Ferdinand Sibleyras, Yosuke Todo

SHAKE Modes of Operation
Joan Daemen, Seth Hoffert, Silvia Mella, Gilles Van Assche

Overloading the Nonce: Rugged PRPs, Nonce-Set AEAD, and Order-Resilient Channels
Jean Paul Degabriele and Vukašin Karadžic

Deck-Based Wide Block Cipher Modes
Aldo Gunsing, Joan Daemen and Bart Mennink

Upgrading AEAD Privacy: The AE2 goal
Mihir Bellare

Length-preserving encryption with HCTR2
Paul Crowley, Nathan Huckleberry, Eric Biggers

The Landscape of Committing Authenticated Encryption
Mihir Bellare, Viet Tung Hoang, Cong Wu

Practical Challenges with AES-GCM and the Need for a New Cipher
Panos Kampanakis, Matt Campagna, Eric Crocket, Adam Petcher

KIVR: Context-Committing Authenticated Encryption Using Plaintext Redundancy and Application to GCM and Variants
Yusuke Naito, Yu Sasaki, Takeshi Sugawara

Proposals for Standardization of Encryption Schemes
John Preuß Mattsson, Ben Smeets, Erik Thormarker

Galois Counter Mode with Secure Short Tags (GCM-SST)
Matthew Campagna, Alexander Maximov, John Preuß Mattsson

Short Tweak TBC and Its Applications in Symmetric Ciphers
Avik Chakraborti, Nilanjan Datta, Ashwin Jha, Cuauhtemoc Mancillas-López, Mridul Nandi, Yu Sasaki

“KohiNoor & DaryaiNoor; two GEMs of Eternal Majesty”: GCTR-based Enciphering Modes [version 1]
Amit Singh Bhati, Michiel Verbauwhede and Elena Andreeva

Flexible Authenticated Encryption
Sanketh Menda, Julia Len, Viet Tung Hoang, Mihir Bellare, Thomas Ristenpart

Constructions based on the AES round and polynomial multiplication that are efficient on modern processor architectures
Shay Gueron

Withdrawn (authors unable to attend)

Light-OCB: Parallel Lightweight Authenticated Cipher with Full Security
Avik Chakraborti, Nilanjan Datta, Ashwin Jha, Cuauhtemoc Mancillas-López, and Mridul Nandi

tHyENA:  A Short Tweak TBC Based Lightweight AEAD
Avik Chakraborti, Nilanjan Datta, Ashwin Jha, Cuauhtemoc Mancillas-López, Mridul Nandi

Registration Info

All attendees must be registered in advance (registration closes September 25).  There is no on-site registration for in-person events held at NIST campuses.  Please see the Security Instructions below for more details.

Registration Fee:  $250.00 USD
Registration fee includes: 

  • continental breakfast
  • box lunch
  • afternoon break/refreshments
  • transportation to/from the Courtyard Gaithersburg Marriott Washingtonian Center (see below for shuttle schedule) 

REGISTER HERE   (registration will close Monday, September 25)

Registration Questions: conferences@nist.gov

Lodging Info

Courtyard Gaithersburg Washingtonian Center
204 Boardwalk Place Gaithersburg, Maryland 20878

Room availability subject to standard rates.  Please make reservations directly with the hotel or your favorite travel site.
Special workshop rate:  Expired (Sept 11, 2023)

Shuttle service between the Courtyard Gaithersburg Washingtonian Center and the NCCoE in the morning and afternoon each day.  

  Tuesday, October 3 Wednesday, October 4
Shuttle Departs Courtyard Marriott 8:15 AM 8:15 AM
Shuttle Departs NCCoE 5:15 PM 5:00 PM

Security Instructions

*Visitor Access Requirement:

For Non-US Citizens:  Please have your valid passport for photo identification.

For US Permanent Residents: Please have your green card for photo identification.

For US Citizens: Please have your state-issued driver's license. 

NIST also accepts other forms of federally issued identification in lieu of a state-issued driver's license, such as a valid passport, passport card, DOD's Common Access Card (CAC), Veterans ID, Federal Agency HSPD-12 IDs, and Military Dependents ID.

Event Details

Starts: October 03, 2023 - 09:00 AM EDT
Ends: October 04, 2023 - 04:30 PM EDT

Format: In-person Type: Workshop


Attendance Type: Open to public
Audience Type: Industry,Government,Academia,Other


National Cybersecurity Center of Excellence (NCCoE)
9700 Great Seneca Highway
Rockville, MD 20850

Parent Project

See: Block Cipher Techniques

Related Topics

Security and Privacy: authentication, cryptography

Created March 06, 2023, Updated September 18, 2023