# GDC26 meeting report published: Post-Quantum Cryptography Migration on DLTs **URL:** \ **Category:** IAM, Key Management & Privacy (IKP)\ **Tags:** gdc26, block15, meeting-report\ **Created:** [September 3, 2026, 10:58pm UTC](https://bgin.discourse.group/t/gdc26-meeting-report-published-post-quantum-cryptography-migration-on-dlts/1045 "2026-09-03T22:58:10Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![shinichiro.matsuo](https://sea1.discourse-cdn.com/flex019/user_avatar/bgin.discourse.group/shinichiro.matsuo/32/11_2.png) [@shinichiro.matsuo](https://bgin.discourse.group/u/shinichiro.matsuo)\ **Post date:** [September 3, 2026, 10:58pm UTC](https://bgin.discourse.group/t/gdc26-meeting-report-published-post-quantum-cryptography-migration-on-dlts/1045/1 "2026-09-03T22:58:10Z")
Dear IKP colleagues, The GDC 2026 breakout in Geneva on **3 September 2026** (17:00–17:50) is now on the BGIN website as a meeting report, with the session slides. The record is written under the **Chatham House Rule** for floor interventions: information may be used; other participants are not identified. Programme speakers were Mitchell Travers (BGIN), Adam (Google Quantum AI), Shin’ichiro Matsuo (BGIN), and Conor (Project 11). The 50-minute session held resource estimates and migration design in one room. NIST primitives already exist. The DLT gap is how to stage a hybrid then a cutover when every node must agree on validity rules, how to keep verifying old signatures, how not to strand dormant funds, and how to tell a genuine PQ-ready stack from a screenshot. It built on the [PQC Migration](https://bgin-global.org/projects/pqc-migration) workstream and a Japan-hosted internationally open prize on applying NIST schemes to blockchain networks — not inventing a new primitive. **Read and cite** - Meeting report: [https://bgin-global.org/news/260903-gdc26-pqc-migration](https://bgin-global.org/news/260903-gdc26-pqc-migration) - Session slides (PDF): [https://bgin-global.org/documents/meeting-reports/gdc26/GDC26\_PQC\_Migration\_DLTs\_Slides.pdf](https://bgin-global.org/documents/meeting-reports/gdc26/GDC26_PQC_Migration_DLTs_Slides.pdf) - Citeable PDF: [https://bgin-global.org/publications/gdc26-pqc-migration](https://bgin-global.org/publications/gdc26-pqc-migration) - Project hub: [BGIN](https://bgin-global.org/projects/pqc-migration) **What the room actually used** - Qubit count and a single Q-day date are the wrong monitors. Error correction, interconnects, compiler progress, and a small near-term probability tail already justify starting now. - Attack classes differ: in-flight versus at-rest versus parameter/exploit-manufacture. Contagion into traditional finance via stablecoins was named. - Crypto agility is the design objective: hybrid then cutover; do not freeze a one-time elliptic-curve-to-ML-DSA rewrite. AI cryptanalysis is already a forcing function. - A Japan-hosted prize will score migration methods on Bitcoin and Ethereum (security plus efficiency), with 2026 definition work, an SSR-adjacent workshop in December, and Block 15 to stand up evaluation. Winner path: BGIN standard then ISO. **Continue at Block 15** Please bring comments, corrections, proposed definitions of a PQC-ready chain, and evaluation-committee interest into this thread. The named continuation is **BGIN Block 15** (15–16 October 2026, Washington, D.C.; hybrid), including **Keynote: PQC** (15 October, 09:20–09:50) and **IKP: PQC Migration** (15 October, 09:50–11:20 and 11:30–13:00). - Event: [BGIN](https://bgin-global.org/events/20261015-block15) - Keynote: [BGIN](https://bgin-global.org/events/20261015-block15/sessions/1-2) - Session: [BGIN](https://bgin-global.org/events/20261015-block15/sessions/1-4) - Registration: [BGIN Block15 Tickets, Thursday, October 15-Friday, October 16  •  8:30 AM-6 PM | Eventbrite](https://www.eventbrite.com/e/bgin-block15-tickets-1990274282957) Anyone can participate on Discourse. No membership application is required. Shin’ichiro Matsuo BGIN Co-Chair ---
**Author:** ![Mitchell](https://sea1.discourse-cdn.com/flex019/user_avatar/bgin.discourse.group/mitchell/32/78_2.png) [@Mitchell](https://bgin.discourse.group/u/Mitchell)\ **Post date:** [September 11, 2026, 1:34pm UTC](https://bgin.discourse.group/t/gdc26-meeting-report-published-post-quantum-cryptography-migration-on-dlts/1045/2 "2026-09-11T13:34:09Z")
Following the report’s invitation for definitional proposals and evaluation-committee participation: both now have a home. The **Post-Quantum Crypto Agility Competition** category carries the competition work, and the repository at [GitHub - bgin-global/pqc-agility-competition: BGIN coordination repository for the METI/NEDO PQC Migration Prize: evaluation committee, outcomes, metrics, crypto-agility testbed · GitHub](https://github.com/bgin-global/pqc-agility-competition) carries the record. The report’s two evaluation axes — theoretical security and implementation efficiency — are the frame the metric register is built on, and the “PQC-ready chain” definition it names as a December deliverable is targeted at the SSR co-located workshop on 13 December. One discrepancy worth flagging rather than quietly resolving: the report targets winner selection for March 2029, while the July community briefing says mid-September 2028. Both are provisional and the host’s call text settles it. The repository carries both, attributed.