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:
Feb. 16, 2021
Filed:
Aug. 24, 2018
International Business Machines Corporation, Armonk, NY (US);
Jason K. Resch, Chicago, IL (US);
Hugo M. Krawczyk, Tarrytown, NY (US);
Mark D. Seaborn, Algonquin, IL (US);
INTERNATIONAL BUSINESS MACHINES CORPORATION, Armonk, NY (US);
Abstract
A computing device including a processor, memory, and instructions, interfaces with a key management system (KMS) that provides encryption keys using an Oblivious Pseudorandom Function (OPRF). The device obtains, based on a type of encryption key being requested, a public key of a public-private key pair. The device creates an Oblivious Key Access Request (OKAR), including a blinded value associated with a requested encryption key. The OKAR is transmitted to the KMS, and a response is received. The response includes a blinded OPRF output, which yields an OPRF output as a result of being subjected to an unblinding operation. The OPRF output is validated using the public key, either directly or via a challenge, and in response to a positive validation, the OPRF output is used as a final key, or an intermediary key used to derive the final key.