Patent ID: 9231936
Filing Date: 2016-01-05
CPC Classification: H04L

Claim Text:
1. A computer-implemented method for authenticating messages, comprising: receiving, by a receiving device, a data message from a sending device, wherein each receiving and sending device is assigned one of two or more trust levels; receiving, by the receiving device, an authentication message from the sending device, the authentication message comprising an authentication code; determining a message identifier for the data transmission, wherein each receiving device is associated with at least one of two or more message identifiers, the two or more message identifiers being assigned to one of two or more message groups, wherein a particular message identifier is assigned to one of the two or more message groups based on a device with the lowest trust level among the receiving and sending devices that use that particular message identifier; authenticating the received data message by using a group key assigned to the receiving device to verify the authentication code.