Patent ID: 8885831
Filing Date: 2014-11-11
Classification: H04L,H04W

Abstract:
1. A method performed by a wireless communication device (WCD), comprising: generating, by the WCD, a first session key; receiving, by the WCD, a temporary identifier allocated to the WCD for the duration of a communication session, wherein an authentication server stores a copy of the first session key and the temporary identifier so that the temporary identifier is mapped to the first session key; using, by the WCD, the first session key to encrypt first data; sending, by the WCD, the encrypted first data encrypted using the first session key to a first access point that has its own copy of the first session key or a key derived from the first session key; as part of a handover from the first access point to a second access point, the WCD sending to the second access point the temporary identifier, thus enabling the second access point to obtain from the authentication server a copy of the first session key or a key derived from the first session key; after sending to the second access point the temporary identifier, the WCD using the first session key to encrypt second data; and the WCD sending the encrypted second data encrypted using the first session key to the second access point.