APOD: Anonymous Physical Object Delivery, Symposium on Privacy-Enhancing Technologies (PETS), 2009. ,
DOI : 10.1007/978-3-642-03168-7_12
URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.154.1111
Blind Signatures for Untraceable Payments, Advances in cryptology, pp.199-203, 1983. ,
DOI : 10.1007/978-1-4757-0602-4_18
How much surveillance can democracy withstand? WIRED, 2013. ,