The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 15, 2019
Filed:
May. 04, 2016
International Business Machines Corporation, Armonk, NY (US);
Marcus Brandenburger, Zürich, CH;
Franz-Stefan Preiss, Zürich, CH;
Kai Samelin, Rueschlikon, CH;
Dieter M. Sommer, Zürich, CH;
International Business Machines Corporation, Armonk, NY (US);
Abstract
In a computer-implemented method for signing a message by a user device of a public key infrastructure (PKI) system, the message and a user public key are sent to at least one attestation server and a server signature on the message is received from the attestation server. The server signature attests the validity of the user public key and is bound to the user public key and the message. The message and the server signature are signed with a user private key, thereby providing a user signature on the message. An attestation server and a related computer program product are also provided.