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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 
  • Registration deadline: TBD 
  • Workshop: October 3-4, 2023 

Registration Info

All attendees must be registered in advance.  There is no on-site registration for in-person events held at NIST campuses.  

Registration details will be posted at a later date.

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 March 21, 2023