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. 05, 2021
Filed:
Jan. 30, 2019
Rsa Security Llc, Bedford, MA (US);
Zulfikar A. Ramzan, Saratoga, CA (US);
Salah E. Machani, Medford, CA (US);
RSA Security LLC, Bedford, MA (US);
Abstract
Techniques are provided for communication-efficient device delegation. One method comprises, in response to a request for a new signing key of a given device, determining a number of new signing key requests received for the user of the given device; determining a new public verification key of the given device for an identity-based signature scheme by traversing a cryptographic hash chain backwards from a position of an initial selected value of the cryptographic hash chain; computing a new signing key based on public parameters and secret parameters of a backup component and the initial selected value; and providing the new public verification key and the new signing key to the given device. The given device authenticates to an authentication service using an identity-based signature computed using the new signing key. The request for the new signing key is submitted, for example, when the given device is lost, damaged, unavailable or stolen.