Thom Wiggers

Thom Wiggers

Senior Cryptography Researcher
Thom Wiggers is a cryptography researcher at PQShield. His PhD thesis was on the interactions of post-quantum cryptography with protocols, under the supervision of Peter Schwabe, at the Institute of Computing and Information Sciences, Radboud University in The Netherlands.

Revisiting PQ WireGuard: A Comprehensive Security Analysis With a New Design Using Reinforced KEMs

WireGuard is a VPN protocol with an efficient, DH-based handshake. Prior attempts at making it PQ heavily relied on Classic McEliece, which has deployment complications. We revisit …

Keitaro Hashimoto
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Extended Key Update FATT Report featured image

Extended Key Update FATT Report

I presented a Formal Analysis Triage Team report on Extended Key Usage (EKU) in the TLS working group session.

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Thom Wiggers
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Fully PQ TLS in the WWW featured image

Fully PQ TLS in the WWW

Key exchange in TLS is now mostly PQ! But what about authentication? In this talk, I discussed some of the ongoing work to make the costs of PQ certificates acceptable so that …

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Thom Wiggers
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A Comprehensive Study of the Signal Handshake Protocol: Bundled Authenticated Key Exchange

The Signal protocol relies on a special handshake protocol, formerly X3DH and now PQXDH, to set up secure conversations. One of its privacy properties, of value to Signal, is …

Keitaro Hashimoto
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Comprehensive Deniability Analysis of Signal Handshake Protocols: X3DH, PQXDH to Fully Post-Quantum with Deniable Ring Signatures

The Signal protocol relies on a handshake protocol, formerly X3DH and now PQXDH, to set up secure conversations. One of its privacy properties, of value to Signal, is deniability, …

Shuichi Katsumata
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Bundled Authenticated Key Exchange: A Concrete Treatment of (Post-Quantum) Signal's Handshake Protocol

The Signal protocol relies on a special handshake protocol, formerly X3DH and now PQXDH, to set up secure conversations. Prior analysis of these protocols (or proposals for …

Shuichi Katsumata
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Comprehensive Deniability Analysis of Signal Handshake Protocols: X3DH, PQXDH to Fully Post-Quantum with Deniable Ring Signatures featured image

Comprehensive Deniability Analysis of Signal Handshake Protocols: X3DH, PQXDH to Fully Post-Quantum with Deniable Ring Signatures

Conference talk presenting a unified framework for deniability analysis of Signal handshake protocols, including a deniable ring signature from Falcon/MAYO.

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Thom Wiggers
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Bundled Authenticated Key Exchange: A Concrete Treatment of (Post-Quantum) Signal's Handshake Protocol featured image

Bundled Authenticated Key Exchange: A Concrete Treatment of (Post-Quantum) Signal's Handshake Protocol

Conference talk presenting the BAKE framework for Signal's handshake protocols, covering X3DH, PQXDH, and the fully post-quantum RingXKEM.

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Thom Wiggers
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Hash-based Signatures: State and Backup Management draft-ietf-pquip-hbs-state-00 featured image

Hash-based Signatures: State and Backup Management draft-ietf-pquip-hbs-state-00

I presented a status update on our IETF draft on stateful HBS state management, now adopted as a PQUIP working group document.

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Thom Wiggers
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How Are We Going to Afford Post-Quantum Authentication? featured image

How Are We Going to Afford Post-Quantum Authentication?

Invited talk for Comcast Research's Monthly Research Presentation Series on the costs and challenges of post-quantum authentication.

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Thom Wiggers
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