The Design and Optimization Algorithm of VCS under Security Protection

To solve the security problem of Video Conference System, we establish a security model, in this model we adopted Windows network driver interface criterion - NDIS, AES-128 bit symmetric cryptosystem, and elliptic curve cryptogram (ECC) - 192 bit asymmetric cryptosystem. And this security model is based on the curves recommended by NIST. With Digital Certificates issued by the CA Center, we designed and realized a VCS and this VCS is encrypt/decrypt based on NDIS network link. Since the encrypt/decrypt algorithm are realized by the FPGA on the hardware, the calculate speed of the system is faster than the system which encrypt/decrypt algorithm are implemented by the software. And because of the communication of the system is base on NDIS security protocol which is more underlying, so the system can guarantee the security of the data transmission more effectively.