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:
Mar. 12, 2024
Filed:
Aug. 28, 2019
Tissot SA, Le Locle, CH;
Jean-Marc Koller, Yverdon-les-Bains, CH;
Tissot SA, Le Locle, CH;
Abstract
In a method for monitoring or tracking between mobile devices of a same group, mobile devices broadcast messages in broadcast mode over a radio interface in compliance with a short-range digital communication protocol. The messages can be received by all other mobile devices in the vicinity and can communicate according to the protocol. The messages include encrypted data encrypted using at least one identifier of the emitter device and a seed intended for single use or having a short period of validity. The encrypted data can only be decrypted by a limited group of devices. The mobile devices receive messages broadcast by other devices and decrypt the messages intended for a group to which they belong. If the protocol provides that the message includes an address field of the emitter device, this field is filled with a randomised address intended for single use or having a short period of use.