Online Seminar
GAPS
About

GAPS online continues the GAPS 2025 workshop, as a regular online seminar. It provides a platform for researchers interested in provable security for symmetric-key cryptography. Topics include proof techniques, security notions, and generic attacks; related topics such as cryptanalysis and mathematical foundations are also welcome.

Schedule
Upcoming talk

The time of the talk is given in UTC.

Applications of Fourier Analysis in Security Proofs of Beyond-Birthday-Bound PRFs
Itai Dinur (Ben-Gurion University and Georgetown University)
Thursday, February 26, 2026 at 14:00

Several well-known beyond-birthday-bound PRFs are built by XORing outputs of permutations. In this talk, I will describe some of the main ideas used in recent Fourier-analytic tight security proofs of such PRFs. I will then discuss some open problems in the application of Fourier analysis in provable security of symmetric-key primitives.

Calendar of Talks
Instructions

The seminars take place on Zoom, and recordings of the presentations may be uploaded to YouTube.

For audience
Joining live session:
  1. If you wish to join the live session, please request access using the following form. You may also consider joining the google group. In either case, please indicate your name and affiliation when requesting access.
  2. The Zoom meeting link and instructions will be posted on the google group / sent to emails by request few hours before the session.
  3. Please join at least 5 minutes ahead of the scheduled start.
  4. Please mute your microphone during the talk, unless you want to ask a question.
  5. We strongly encourage questions. You may unmute and directly ask the question, or write on the in-built chat and the moderator will inform the speaker.
  6. All talks and up to 15 minutes of Q&A will be recorded. An unrecorded Q&A may follow directly after that.
Watching the recorded talks:
  1. We will post all talks to the YouTube channel, if the speaker agrees.
  2. A separate google group conversation thread will be open (for up to 15 days) for offline discussions with the speaker.
For speakers
  • One of the goals of this online seminar is to make research on symmetric-key cryptography more widely accessible, so by default we will share the talk recordings on YouTube. Please let us know in advance if you DO NOT want your presentation to be recorded. If your presentation is recorded, please ensure that it does not include any copyrighted material.
  • Talks are expected to last approximately 1h. The format is flexible, but talks should be accessible to a broad audience.
  • Try to join about 10-15 minutes before your session to make sure your setup is working smoothly.
Contact
The online GAPS seminar is organised by:

  • Ritam Bhaumik
  • Wonseok Choi
  • Avijit Dutta
  • Ashwin Jha
  • Mustafa Khairallah
  • Charlotte Lefevre
  • Yaobin Shen

You may contact them at onlinegaps@gmail.com to suggest talks, or to join the google group. Please note that talk slots are limited, so we may not be able to accommodate every suggestion.