black on black
embroidered patch 
with logo iRD 
the patch reads: 
σ ≠ 1984
(stealth does not equal 1984) 

and RLE (run length encoding 0100000  - 1011111

RLE 010 000 - 101 1111 signifies the key to the DCT encryption: 010 000 - 101 1111 are the binary values of the 64 most used ASCII glyphs, which are then mapped onto the DCT in a zig zag order (following RLE).

A PDF about this work is downloadable here  

i.R.D. Patch
[including the key to DCT]