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:
Aug. 24, 2021
Filed:
Feb. 18, 2015
Telefonaktiebolaget Lm Ericsson (Publ), Stockholm, SE;
Patrik Salmela, Espoo, FI;
John Fornehed, Sollentuna, SE;
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm, SE;
Abstract
A method () for establishing a new identity for a constrained device is disclosed, wherein the device has an existing identity and is associated with an asymmetric key pair comprising a device public key and a device private key. The method comprises applying a hash function to the existing identity () and setting the resulting value as the new identity for the constrained device (), wherein the existing identity comprises at least a first generation hash value of a hash chain formed by applying the hash function to the device public key. Also disclosed is a method () for managing an identity of a constrained device, the device being associated with an asymmetric key pair comprising a device public key and a device private key. The method comprises maintaining a record of the device public key (), receiving an identity from the device (), sequentially applying a hash function to the device public key to generate a hash chain of the device public key (), and identifying a hash value in the hash chain matching the identity received from the device ().