Aiming at the characteristic that the document transmiting must be reliability and security,generalizes three schemes of digital signature in e-government,and then presents a scheme of digital signature based on hybrid cryptosystem.

Against the problem of the security and complexity of the electronic document, we propose a method of combining the hybrid cryptosystem and digital signature, and for the practicality and flexility, We use the technique of component object model We integrate seamlessly this system into the microsoft word softwar

For a detailed analysis, it studies principles and the process of the authentication mechanisms as the initiative to attack, as well as passive attacks on the encryption mechanism, which focuses on a data encryption technologies-hybrid cryptosystem.

This paper combines the authentication protocol based on symmetric key with the authentication protocol based on public key,provides a general hybrid cryptograph transfer protocol(HCTP) applied in password synchronization.

Analysis on the mixing of pollutants in water current combining with waves;

Recent research progress in mixing of high viscous fluid;

Comparison of abrasive mixing methods in the WJC devices;