rypto - market . ▁It ▁operated ▁using ▁the ▁Tor ▁network ▁and ▁all ▁transactions ▁used ▁bit co in . ▁It ▁was ▁shut ▁down ▁by ▁the ▁F BI ▁in ▁ 2 0 1 3 . ▁Sil k road ▁was ▁quickly ▁replaced ▁by ▁other ▁crypt om ark ets ▁and ▁today ▁there ▁are ▁several ▁compet ing ▁mark ets ▁operating ▁in ▁parallel . ▁ ▁Open B az aar ▁is ▁an ▁open ▁source ▁project ▁developing ▁a ▁protocol ▁for ▁e - commerce ▁transactions ▁in ▁a ▁fully ▁decent ral ized ▁market place . ▁It ▁uses ▁the ▁crypt oc urrency ▁bit co in ▁and ▁was ▁inspired ▁by ▁a ▁hack athon ▁project ▁called ▁Dark Mark et . ▁ ▁An onymous ▁trad ing ▁is ▁easier ▁to ▁achieve ▁for ▁information ▁services ▁that ▁can ▁be ▁provided ▁over ▁the ▁Internet . ▁Prov iding ▁physical ▁products ▁is ▁more ▁difficult ▁as ▁the ▁an onym ity ▁is ▁more ▁easily ▁broken ▁when ▁crossing ▁into ▁the ▁physical ▁world : ▁The ▁vendor ▁needs ▁to ▁know ▁where ▁to ▁send ▁the ▁physical ▁goods . ▁U nt race able ▁money ▁makes ▁it ▁possible ▁to ▁ignore ▁some ▁of ▁the ▁laws ▁of ▁the ▁physical ▁world , ▁as ▁the ▁laws ▁cannot ▁be ▁enfor ced ▁without ▁knowing ▁people ' s ▁physical ▁ident ities . ▁For ▁instance , ▁tax ▁on ▁income ▁for ▁online ▁services ▁provided ▁via ▁the ▁c rypto - an arch ists ▁networks ▁can ▁be ▁avoided ▁if ▁no ▁government ▁knows ▁the ▁identity ▁of ▁the ▁service ▁provider . ▁ ▁Ass ass ination ▁Market ▁is ▁a ▁Tor - based ▁market ▁operated ▁by ▁a ▁self - des cribed ▁c rypto - an arch