Patent ID: 8261350
Filing Date: 2012-09-04
Classification: H04L

Abstract:
1. A method for protecting communication devices from denial of service attacks, comprising: calculating, at a first device, an access filter value uniquely associated with a second device using one or more secrets shared between the first device and the second device; tabulating the access filter value uniquely associated with the second device in an array, wherein the first device tabulates the access filter value in the array based on a pseudo identifier uniquely assigned to the second device; receiving a message from the second device at the first device, wherein the message received from the second device includes a hash value that the second device calculated using the one or more secrets shared between the first device and the second device; reading the access filter value uniquely associated with the second device from the array, wherein the first device reads the access filter value from the array based on the pseudo identifier uniquely assigned to the second device; and authenticating the message received from the second device in response to the first device determining that the hash value included in the message matches the access filter value read from the array.