Priority-based ordering of cryptographic processing in wireless communication apparatus

摘要

Wireless communication apparatus (WAP) which comprises means of receiving data streams such as Access Stratum User Plane (AS UP), Access Stratum Control Plane (AS CP), and Non-Access Stratum Control Plane (NAS CP), each at least partly requiring a cryptographic processing operation, a cryptographic module comprising a cryptoprocessor, and management means configured to deliver at least some of the data streams to the crypto-processor according to an order of priority defined from the data types and cryptographic processing types assigned to each data stream.

主权项

1. A method of processing data streams received or to be transmitted by a wireless communication apparatus comprising a crypto-processor, each data stream at least partly requiring a cryptographic processing operation, comprising:
assigning a data type and a cryptographic processing type to each data stream, wherein cryptographic processing types include at least data streams having encrypted packets and requiring cryptographic pre-processing followed by cryptographic post-processing and data streams requiring synchronous cryptographic processing; processing at least some of the data streams within the crypto-processor according to an order of priority defined from the assigned data types and the cryptographic processing types; and wherein the cryptographic pre-processing includes a pre-calculation of an encrypting sequence that is performed based on a reception quality of the data streams and an indication associated with a change-of-cell.