Patent ID: 9454755
Filing Date: 2016-09-27
CPC Classification: G06Q

Claim Text:
1. Transaction method of transmitting anonymous electronic cash between a first entity (U) identified by a public key (pk u ) and a second entity (M) for providing anonymity revocation comprising: storing a divisible coin of value n assigning the divisible coin of value n constructing a root key (K computing respective node keys (LKey, RKey) for the n direct descendant nodes of a parent node, by using a verifiable one-way function (F), wherein said computed keys (LKey, RKey) for said n direct descendant nodes are unlinkable between them without the knowledge of the parent node key; generating a ciphertext (T) in the electronic device by encrypting the public key (pk transmitting, from the electronic device to said second entity (M), a fraction of the divisible coin of electronic cash with said ciphertext (T), the keys of the direct descendants of the selected node and a proof (Φ) of validity of a correct computing of said ciphertext (T) and said keys of said direct descendants.