SUMMARY

In one implementation, a system for generating a secure signature uses a device-specific and/or group-specific moving target authentication protocol. Generating the secure signature entails at least determining a time-variable state of a first device in association with a select time interval and computing an output for a signing function that depends upon the determined state of the first device associated with the first time interval.

This Summary is provided to introduce a selection of concepts in a simplified form that are further described below in the Detailed Description. This Summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter. These and various other features and advantages will be apparent from a reading of the following Detailed Description.

