Key Technology Research In SCWS Card Remote Management Server

SCWS (Smart card web server) card is the next generation SIM card, in which a web server is built. SCWS card improves user's experience and achieves more value-added business functions. The role of SCWS card remote management server is to manage the SCWS card remotely and help SCWS card to achieve value-added service functions by transmitting data and commands.An in-depth analysis and research of the key technologies of SCWS card remote management server based on OMA SCWS Specification has been done in this thesis. For the issues in data transmission and security, solutions and improvements are proposed in this thesis. Simulations are provided to show the benefits of the proposed method.This thesis firstly studies the performance difference of TCP and UDP protocols between the wired and wireless environment. A TCP/UDP protocol selection mechanism is then proposed. This selection mechanism test bed is implemented using Opnet software. The proposed scheme is validated from the simulation results. In this mechanism, the server can choose the most appropriate transport protocol for the current environment, in order to improve data transmission performance.Secondly, in terms of security protocol, certain improvement of the shortcoming of PSK-TLS shakehand protocol in security is carried out. By encrypting the critical information in shakehand protocol, this study makes PSK-TLS achieve perfect forward secrecy. The communication process of PSK-TLS protocol is also designed and implemented using OpenSSL package. The performance testing demonstrates that the improved PSK-TLS protocol enhances the security while its shakehand efficiency decreases a little. It reaches a trade-off between security and efficiency. Because the security of PSK-TLS record protocol must be based on a reliable transmission channel, this thesis introduces the UDP+CAT TP pattern, which can ensure the safe implementation of PSK-TLS protocol. Finally, with the pre-shared key technology, a dynamic password authentication scheme based on SCWS card is proposed, which is an effective supplement to security protocol. By using this authentication scheme, the security of SCWS card can be further improved.