公开(公告)号：EP3764613A1

公开(公告)日：2021-01-13

申请号：EP19305927.6

申请日：2019-07-09

Applicant: GEMALTO SA

Inventor： DELSUC, Julien ,  LEROY, Pascal

IPC: H04L29/06 ,  H04L9/32

Abstract: The invention relates to a method 20 for accessing a private key.
The method comprises:
- storing, by a first device 12, the private key and an associated public key;
- generating 22 an access token;
- sending 24 to a second device 14, the access token;
- sending 28, to a first server 16, an address relating to a decentralized identifier and the access token;
- sending 29, by the first server, to a ledger 112, a request for getting a decentralized identifier along with the decentralized identifier address;
- sending 212, to the first server, the decentralized identifier including the public key;
- generating 214 a challenge;
- encrypting 216 the challenge;
- sending 218, through a second server 18, to the first device, the encrypted challenge and the access token, an address relating to the second server being identified by using the decentralized identifier;
- verifying 224 whether the received access token is or is not the generated access token;
- decrypting 226, only in the affirmative, by using the private key, the encrypted challenge;
- sending 228, to the first server, the challenge;
- verifying 230, whether the received challenge is or is not the generated challenge; and
- attesting 232, only in the affirmative, that the decentralized identifier includes data that belongs to a user.
The invention also relates to corresponding first device, first and second server and system.