Let me see some identification

When the stormtroopers pull Luke and Obi-Wan over in Episode IV, they ask for identification. What are they looking for, a driver's license or a debit card?

Lightsaber condoms.

Iris scans

Barcode. Empire ran Tatooine like a concentration camp, and you can tell from all the sand; It's rough, and coarse and irritating.

And it gets everywhere

OMG...