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. 30, 2018
Filed:
Nov. 02, 2016
Isara Corporation, Waterloo, CA;
Michael Kenneth Brown, Fergus, CA;
Anthony Chun Li Hu, Kitchener, CA;
Marek Paruzel, Kitchener, CA;
Atsushi Yamada, Toronto, CA;
ISARA Corporation, Waterloo, Ontario, CA;
Abstract
In a general aspect, a Merkel signature scheme (MSS) uses subtree data. In some aspects, subtree data is loaded from a non-volatile memory into a volatile memory. The subtree data represents one or more nodes of a subtree of a cryptographic hash tree and a first authentication path portion that includes nodes outside the subtree. The subtree includes a subtree root node at a level below a root node of the cryptographic hash tree and lowest-level nodes of the cryptographic hash tree, which are based on respective verification keys for a one-time signature (OTS) scheme. An OTS is generated using a first signing key associated with a first verification key, which is associated with a lowest-level node in the subtree. The OTS, the first verification key, the first authentication path portion, and a second authentication path portion comprising one or more nodes of the subtree are sent to a recipient.