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:
Dec. 03, 2019
Filed:
Feb. 16, 2015
Nec Laboratories Europe Gmbh, Heidelberg, DE;
NEC CORPORATION, Tokyo, JP;
Abstract
A method for verifying information of a first data item in a plurality of different data items stored on a server includes a) generating a hash tree, b) computing an authentication path for the first data item based on a recomputation of the hash tree, wherein an authentication path includes all siblings of tree nodes from the first data item to a root of the hash tree, c) recomputing the root-hash based on the first data item and a computed authentication path of the first data item and comparing the recomputed root-hash with the root-hash of the hash-tree of step a), d) determining a side element in leaves or a tree level above of the hash tree and its authentication path, and e) verifying the authentication path of the side element.