▁and ▁anonymous ▁Internet ▁bank ing ▁exists ▁in ▁these ▁networks . ▁In ▁the ▁past , ▁this ▁was ▁handled ▁only ▁by ▁central ized ▁organizations . ▁Digital ▁Mon et ary ▁Trust ▁and ▁Y odel bank ▁were ▁examples ▁of ▁two ▁such ▁anonymous ▁banks ▁that ▁were ▁later ▁put ▁off line ▁by ▁their ▁cre ators . ▁Uk ash ▁is ▁an ▁e - m oney ▁network . ▁C ash ▁in ▁amounts ▁up ▁to ▁£ 5 0 0 / € 7 5 0 ▁can ▁be ▁sw apped ▁for ▁a ▁ 1 9 - digit ▁Uk ash ▁v ouch er ▁in ▁payment ▁terminal s ▁and ▁ret ail ▁out lets . ▁ ▁Bit co in ▁is ▁a ▁currency ▁generated ▁and ▁secured ▁by ▁peer - to - pe er ▁network ed ▁devices ▁that ▁maintain ▁a ▁commun al ▁record ▁of ▁all ▁transactions ▁within ▁the ▁system ▁that ▁can ▁be ▁used ▁in ▁a ▁c rypto - an arch ic ▁context . ▁The ▁idea ▁behind ▁bit co in ▁can ▁be ▁trac ed ▁to ▁The ▁C rypto ▁An arch ist ▁Man if esto . ▁There ▁exist ▁a ▁large ▁number ▁of ▁alt co ins , ▁some ▁of ▁which ▁have ▁op aque ▁led gers ▁such ▁that ▁transactions ▁between ▁pe ers ▁can ▁be ▁un trace able ▁( the ▁first ▁protocol ▁for ▁this ▁is ▁known ▁as ▁the ▁Z er oco in ▁protocol , ▁see ▁also ▁Mon ero ). ▁Some ▁alt co in ▁curr encies ▁also ▁act ▁as ▁decent ral ized ▁autonom ous ▁organizations , ▁or ▁act ▁as ▁platforms ▁for ▁en abling ▁such ▁organizations . ▁ ▁Sil k ▁Road ▁was ▁the ▁first ▁anonymous ▁c