Patent ID: 9735966
Date: 2017-08-15
CPC Classifications: G06F,H04L

Claim:
1. A method for providing evidential data, comprising at a mobile device: establishing one or more first secret tokens with a server; obtaining one or more data items from one or more sensors; combining the one or more data items with at least one of the one or more first secret tokens to provide one or more modified data items; generating a respective first hash value for each of the one or more modified data items; generating a second hash value for a data set including each of the one or more data items; transmitting a first message comprising the one or more data items, the one or more first hash values, and the second hash value to the server, wherein the first message is usable by the server to authenticate the one or more data items; and establishing one or more second secret tokens with the server after transmission of the first message, the one or more second secret tokens for combining with one or more second data items obtained from the one or more sensors for generating a second message; obtaining one or more transaction identifiers, the one or more transaction identifiers including one or more static identifiers; and transmitting an indication of the static identifiers to the server, including generating a respective third hash value for each of the one or more static identifiers, wherein the indication includes the third hash values, wherein the one or more first secret tokens are pre-shared with the server before transmitting the first message comprising the one or more data items.