Von Ralf Keuper

Unter den vie­len Stu­di­en, die sich mit den Ein­satz­mög­lich­kei­ten der Block­chain-Tech­no­lo­gie für die Ver­wal­tung digi­ta­ler Iden­ti­tä­ten beschäf­ti­gen, ragt Towards Self-Sov­er­eign Iden­ti­ty using Block­chain Tech­no­lo­gy für mich deut­lich her­vor. Dar­in stel­len die Autoren auch eine eige­ne Lösung bzw. das ent­spre­chen­de Design sowie ein Fallbeispiel/​Proof of Con­cept (KYC) der Rab­obank vor.

Um auf Basis der Block­chain trag­fä­hi­ge Geschäfts­mo­del­le zu ent­wi­ckeln, rei­chen pri­va­te (per­mis­sio­ned) Block­chains nach Ansicht der Autoren nicht aus:

Block­chain tech­no­lo­gy should allow any num­ber of enti­ties to do tran­sac­tions with each other, without the need to ent­i­re­ly trust each other. Per­mis­sio­ned block­chains crea­te depen­den­ci­es on trus­ted third par­ties in the infra­st­ruc­tu­re its­elf. This crea­tes an unfair advan­ta­ge and heigh­tens ent­ry bar­ri­ers for new entrants.

Alt­hough per­mis­sio­ned block­chains can be lin­ked as side­chains to public and per­mis­sio­ned block­chains to hand­le more sen­si­ti­ve data, the con­nec­ting chain should be public. This allows any enti­ty to con­nect to the sys­tem without having to pay licen­sing fees.

It will be assu­med that the ide­al DIMS will be built on a public block­chain, whe­re iden­ti­ties are estab­lis­hed at the edge of the net­work and not in the net­work itself.

Das Ver­trau­ens­pro­blem wer­de mit der Block­chain nicht wirk­lich, d.h. final gelöst:

It is important to under­stand that this net­work of decen­tra­li­zed trust works best for sol­ving the dou­ble spen­ding pro­blem, sin­ce it is pro­ven that cer­tain cur­ren­cy has been ”made”. For claims this is dif­fe­rent. The net­work does not know why a claim has been made by a cer­tain enti­ty. The only thing that is non-repu­ta­ble is that a cer­tain claim is made by a cer­tain enti­ty on a cer­tain moment in time.

Inso­fern blei­ben Insti­tu­tio­nen wich­tig, wel­che im Hin­ter­grund für die ein­deu­ti­ge Veri­fi­zie­rung sorgen.

Cross­post von Iden­ti­ty Economy

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