Cryptographic Credential Re-issuance With Public Key Re-randomization

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PRIVACY PRESERVING CREDENTIAL TOKEN ISSUANCE

Application US20260100833A1 Kind: A1 Apr 09, 2026

Inventors

Alessandro Sorniotti, Elli Androulaki, Kaoutar El Khiyaoui, Yacov Manevich, Jens Jelitto, Ilie Circiumaru, Pasquale Convertini

Abstract

Mechanisms are provided for re-issuance of credentials in a data network. The mechanisms receive, from a requester entity, a first request to re-issue a target credential in a plurality of credentials of a public credential listing. Any entity, in a plurality of entities, can request re-issuance of any credential in the plurality of credentials and have the credential successfully re-issued to that entity. The mechanisms, in response to the request to re-issue the target credential, re-randomize an original public key associated with the target credential to generate a re-randomized public key. The mechanisms generate a new credential based on the target credential but with the original public key replaced with the re-randomized public key. The mechanisms provide the new credential to the requester entity. The requester entity can use the new credential for authentication successfully only if the requester entity is an owner of the target credential.

CPC Classifications

H04L 9/30

Filing Date

2024-10-04

Application No.

18906336

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