Patent ID: 9385995
Filing Date: 2016-07-05
CPC Classification: G06Q,H04L

Claim Text:
1. A method for anonymous purchase by a first user device, the method comprising performing in the first user device: obtaining an anonymized token, data string T, by performing the following steps: selecting a random number r; deriving a result, R, by performing a one-way function on the random number r; sending R from the first user device to a second user device, the second user device sending R to a service provider, the service provider storing R with a data string T and returning a digitally signed R and T to the second user device, thereby providing the data string T to the second user device; storing r; receiving, from the second user device, R and T at the first user device, thereby ensuring that the identity of the first user device remains unknown to the service provider; using T to execute an anonymous purchase of a service by performing the following steps: opening a communication channel between the first user device and the service provider; sending the service provider the stored r and the received T from the first user device to the service provider via the communication channel along with a request for the service provider to provide a service; and