Falcon-based implicit certificates
EP4747997A1Pending Publication Date: 2026-05-27NAT RES COUNCIL OF CANADA
Patent Information
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- NAT RES COUNCIL OF CANADA
- Filing Date
- 2024-07-18
- Publication Date
- 2026-05-27
AI Technical Summary
Technical Problem
Existing implicit certificate schemes are vulnerable to attacks by quantum computers, and efforts to develop post-quantum implicit certificate schemes have been unsuccessful.
Method used
The development of a post-quantum implicit certificate method using the FALCON signature scheme, which generates a reconstruction value that allows third parties to authenticate a public key without revealing the secret key, thereby reducing bandwidth requirements.
Benefits of technology
The proposed method reduces the bandwidth requirement for using FALCON signatures and certificates by 271 bytes, while maintaining security, making it suitable for applications like vehicle-to-vehicle communication.
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Smart Images
Figure CA2024050954_23012025_PF_FP_ABST
Abstract
A post-quantum implicit certificate method for signing a message, the method comprising the following steps implemented using at least one processor-based system:at a public key originator, generating a message attesting to identity (msg) and a FALCON public key (h U ), and signing the message using the FALCON public key (h U ) to generate a signature; sending the public key, the message, and the signature to a certificate authority; and at the certificate authority, verifying the signature on the message attesting to the identity (msg), and generating reconstruction value for the public key using certificate authority's own secret key; at a verifier, using the reconstruction value and the certificate authority's public key to generate the public key (h U ).
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