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:
Apr. 28, 2020
Filed:
May. 28, 2016
Guardtime Ip Holdings Limited, Tortola, VG;
Hema Krishnamurthy, Phoenix, AZ (US);
Jeffrey Pearce, Hilo, HI (US);
Guardtime SA, Lausanne, CH;
Abstract
Data packets passing from a source to a destination in a network according to a Service Function Chain (SFC) are processed by an ordered sequence of at least one service function (SF). For each SF in the SFC in order, a current value of a function, such as a hash function, is recursively computed including, as input values, at least current identifying data that identifies a corresponding current one of the SFs, and a value of the function output from an immediately preceding SF. After computing the current value of the function for a selected SF in the SFC, the current value of the function is compared with an expected value. If the value of the function for the selected SF is the same as the expected value, the data packet is allowed to be transmitted to a subsequent processing stage; if not, then an error response action is taken.