Examples
For example, if a certain emitter is known as the radio transmitter of a certain unit, and by using DF (direction finding) tools, the position of the emitter is locatable; hence the changes of locations can be monitored. That way we're able to understand that this certain unit is moving from one point to another, without listening to any orders or reports. If we know that this unit reports back to a command on a certain pattern, and we know that another unit reports on the same pattern to the same command, then the two units are probably related, and that conclusion is based on the metadata of the two units' transmissions, and not on the content of their transmissions.
Using all, or as much of the metadata available is commonly used to build up an Electronic Order of Battle (EOB) – mapping different entities in the battlefield and their connections. Of course the EOB could be built by tapping all the conversations and trying to understand which unit is where, but using the metadata with an automatic analysis tool enables a much faster and accurate EOB build-up that alongside tapping builds a much better and complete picture.
Read more about this topic: Traffic Analysis
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