ANONYMOUS CONTACT TRACING SYSTEM AND METHOD

摘要

The present invention involves a method for anonymous contact tracing for a user with a mobile device in a location having an associated contract tracing system having a plurality of tokens. The user has a mobile device upon which the user obtains a token from the location and/or the contact tracing system. The mobile device stores the user's space-time coordinate information. There is a recording of space-time coordinate information of each mobile device that is traceable by the contact tracing system in association with one of the tokens. When a user reports the existence of an exposure event, the contact tracing system analyzes the token-coordinate information to determine which of the tokens have been subject to the exposure event. By notifying at least one of the users with an associated token that was subject to the exposure event, those users may also check to see if they have been subject to the same exposure event. The method may be implemented by a server and by software running on a mobile device. The present invention involves an anonymous contact tracing system and method for a user with a mobile device in a location having a contract tracing system. The method steps include obtaining a token from the contact tracing system using a mobile device; storing the user's space-time coordinate information on the mobile device; recording space-time coordinate information of each mobile device that is traceable by the contact tracing system in association with the associated tokens; reporting the existence of an exposure event by the user; analyzing all of the contact tracing system's token-coordinate information to determine tokens that have been subject to the exposure event; and notifying at least one of the users having an associated token having been subject to the exposure event. In addition, the contact tracing system may include a website. The step of obtaining may be performed by the mobile device requesting a token from the contract tracing system website. The token is uniquely identifiable by the contact tracing system, and lacks any personally identifying information relating to the user, and the obtained token may be stored with the user's space-time coordinate information, optionally in a browser storage of the mobile device. The invention further involves a server for implementing the method, and a mobile device App enabling the method.