In the old model, a Property object has name, flags, and value, represented in XPS as <name>=<flags>=<value>.
2 is the same as 0, should not be used. only 0 and 1 should be used.
Flags is a bit-set, but only the first bit is used, for 'encrypted'.
So, any even value means 'not-encrypted> and any odd value means 'encrypted'