What Are Traffic Analysis and Metadata?
In Learning Tree’s System and Network Security Introduction we discuss “traffic analysis,” noting that even if data are encrypted, one can still find out information by looking at who is sending encrypted data to whom. Along that same line, there has been a lot of discussion in the press recently about “metadata” – information about […]
What Is Metadata and Why Do We Care?
Metadata is defined as “data about data.” This is a terrible definition; let’s see if we can make better sense of it. If we examine: What can we deduce? It’s a word file, created 24/11/2011, 26 KB in size and based on the file name, it’s a performance review for employee 1244. All this information […]