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    Presentations 2026
Presentation

THQC: Threshold HQC-KEM Decryption

October 13, 2026

Presenters

Jean-Christophe Deneuville - Ecole Nationale de l'Aviation Civile (ENAC) @ France

Description

"Preview Talk" (by team THQC) @ TCPT3, in reply to the NIST Threshold Call

Abstract:  This talk introduces THQC (Threshold Hamming Quasi-Cyclic), a threshold decryption version of FIPS (Federal Information Processing Standards) 207 HQC-KEM (Hamming Quasi-Cyclic Key-Encapsulation Mechanism). The decryption key is split using Shamir Secret Sharing.  Standard HQC parameters do not allow us to thresholdize decryption straightforwardly.  We will cover existing primitives making thresholdization possible.

Joint work: Jean-Christophe Deneuville, Nathan Maillet, Vincent Migliore, Cyrius Nugier.

Suggested readings

Presented at

Presented at NIST TCPT3: Threshold Call Preview Talks #3 (4th day; 2026-Oct-13)

Event Details

Location

    
                            

                    


                    

        
 Related Topics


            

                Security and Privacy:
                    cryptography            

    


            

        

    




    


            Created October 13, 2026