Abstract: A system and method for generating a message integrity code, MIC, for a MAC protocol data unit in a wireless local area network, WLAN, operating according to the IEEE 802.11 standard. A MAC service data unit, MSDU, sequence control sequence number, SN, input to the MIC algorithm is suppressed, e.g. set to all zeros, when calculating the MIC. Only the fragment number, FN, portion of the sequence control is included in calculation of the MIC. The MIC may therefore be calculated before an actual SN has been determined. All MPDUs include sequential packet numbers, PNs. A station receiving MPDUs checks the PNs of MPDUs having the same SN, and rejects messages which do not have a proper sequential set of PNs.

Abstract: A rights management module controls access to a data set by processing requests for flexibly defined types of access to the data set and determines if the requested access may be granted. The requester's right for the requested type of access is verified by a verification module that may be part of the rights management core or verified through expansion rights verification modules. Extension verification modules may be contained within the data set itself or obtained from a separate store. Extension verification modules are authenticated by the rights management core.