Time and geographical diversity-based symmetric cryptography for protecting information

Abstract

Disclosed are systems and techniques for time and geographic diversity-based for symmetric cryptography for protecting communications. For example, a device can transmit, while in a first geographic tile associated with a first group key used by wireless devices within the first geographic tile, a first application message and a first authentication code to one or more wireless devices, wherein the first authentication code is generated based on cryptographic transformation of the first group key to the first application message, and receive, while in the first geographic tile, a second application message and a second authentication code from a first wireless device located in a second geographic tile associated with a second group key, wherein the second authentication code is generated based on application of the second group key to the second application message.

Dependencies are inferred from the claim text.