Re: When the metadata is data?
And how deep can metadata be?
IP A connected to IP B on port 1234 at 12pm is Layer 3.
Thats pretty light and is a lot like telephones. A stupidly large amount of data though.
Email from User A was sent to User B at 12pm is somewhat deeper.
That actually means intercepting everything including the data and pulling the bits of interesting 'metadata' out.
User A is chatting to User B over IRC.
That goes really deep and isn't just a matter of listening to the headers. You need to listen to the entire connection for the entire duration that it exists and every fragment of data has to be analysed closely.
Its a lovely fluffy word to say but on a technical level it can mean any amount of deep packet inspection.