US 11,670,426 B2
Privacy-enhanced contact tracing using mobile applications and portable devices
Yamit Mody, San Diego, CA (US); Sheehan Alam, San Diego, CA (US); Adam Golab, Santa Clara, CA (US); Yevgeniy Goldin, San Francisco, CA (US); Senthil Rajavallipuram Meenakshisundaram, Santa Clara, CA (US); Anita Ranganath, Santa Clara, CA (US); Adam Danial Yanalunas, San Diego, CA (US); and Probir Das, Santa Clara, CA (US)
Assigned to ServiceNow, Inc., Santa Clara, CA (US)
Filed by ServiceNow, Inc., Santa Clara, CA (US)
Filed on Dec. 2, 2022, as Appl. No. 18/74,185.
Application 18/074,185 is a continuation of application No. 17/729,504, filed on Apr. 26, 2022, granted, now 11,545,268.
Application 17/729,504 is a continuation of application No. 17/076,218, filed on Oct. 21, 2020, granted, now 11,342,081, issued on May 24, 2022.
Prior Publication US 2023/0094135 A1, Mar. 30, 2023
Int. Cl. G16H 50/80 (2018.01); G16H 10/60 (2018.01); G16H 70/60 (2018.01); H04W 4/02 (2018.01); H04W 4/20 (2018.01); G06Q 50/26 (2012.01); H04W 12/088 (2021.01); H04W 4/80 (2018.01)
CPC G16H 50/80 (2018.01) [G06Q 50/265 (2013.01); G16H 10/60 (2018.01); G16H 70/60 (2018.01); H04W 4/023 (2013.01); H04W 4/20 (2013.01); H04W 12/088 (2021.01); H04W 4/80 (2018.02)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
in response to a request for contact tracing, receiving, from a user device, device adjacency data, wherein the device adjacency data indicates a plurality of contact entries, and wherein each of the plurality of contact entries indicates a respective device identifier of another user device and indicates a respective timestamp corresponding to a detection time of the other user device;
storing an encrypted representation of the device adjacency data in a database;
based on the device adjacency data, transmitting a notification that a user of a further user device has been exposed to a pathogen; and
based on the respective timestamps, erasing at least one of the contact entries of the device adjacency data from the database.