The Service Network End Implement of F1 to F5 for 3G AKA Protocol
Abstract
Along with the mobile communication technology rapid development, so security problem appears importantly extremely. Therefore, how guaranteed the security of service information as well as the security of network resources has become in the 3G system important and the urgent question. In view of this kind of situation, both ETSI and 3GPP based on GSM/GPRS network and WCDMA and TD/SCDMA system standardization organization, specially ETSI's SAGE and The 3GPP S3 work team has specially conducted the research to the network security. It includes the key deed of distribution which this article involves (the AKA agreement).
The AKA protocol uses in USIM, bidirectional authentication and the key assignment between visits location register (VLR) and belongs to the location register (HLR). 3GPP communications system defines 2 kind of warning power algorithm: f0 to f9, f1* and f5*. F0-f5* is used in AKA. Its implement divides into two aspects, one is in implement of UE (handset) terminal, and other is in the service network terminal. The implement of UE terminal is based on 8 monolithic integrated circuits, but the implement of service network terminal is in based on 32 processors which is on PC machine. But all are based on the AES essence algorithm, namely Rijndael algorithm. As a result of hardware difference, Rijndael algorithm has used the different optimized algorithm. This design is in the service network end implement, therefore, the Rijndael algorithm used has substituted a turn transformation with the table look-up way the optimized algorithm. This design is begins with AES, through to the AES analysis and the code implement, then the use to the AES, realizes the f1-f5 function. Moreover, because this design uses AES which is the core algorithm, it analyzes the AES correlation mathematics elementary knowledge and the implement principle.
Key words: 3GPP; AKA; Rijndael; Service network end ;Key production algorithm
