Evidence provides the basic building blocks for how code access security can work on .NET Framework code. An example of evidence about code is its SHA1 hash value.
This value is a cryptographically strong piece of information that is unique for different pieces of code. Thus, it is useful in providing identification.
For more information on cryptographic hash values, see Chapter 30, “Using Cryptography with the .NET Framework: The Basics.”
There are two key points to remember about evidence:
Evidence applies to executing code itself, not the user who is executing the code.
Evidence is applied to the granularity of assemblies and application domains.
Application domains will be mentioned several times in this book. They ...