Patent ID: 9088420
Filing Date: 2015-07-21
Classification: G06F,H04L,H04W

Abstract:
1. A method for authenticating timely possession of a received data block by a client device, the method comprising: receiving a received hash value at an authentication server from the client device through a communication network; storing a hash value receiving time of the received hash value, the hash value receiving time comprising a time when the received hash value is received from the client device at the authentication server; receiving a received data block after receiving the received hash value, the received data block comprising alleged transmission signal data; computing a computed hash value of the received data block at the authentication server; calculating at the authentication server an estimated transmission signal client receiving time based on the alleged transmission signal data, wherein the estimated transmission signal client receiving time is an estimate of when transmission signal data should be received by the client device; and authenticating timely possession of the received data block by the client device based on a comparison of the computed hash value to the received hash value and a comparison of the hash value receiving time to the estimated transmission signal client receiving time.