Reverse thinking as a common way of thinking has been recognized in course teaching of higher education , but it is only mainly applied in the traditional subjects and rarely used in the professional course teaching of educational technology. This paper makes use of the principle of reverse thinking, designs the teaching process of distance education with the strategies of "reverse conversion", "process inversion," "reversing the position" and "finding causes from results", the "distance education", and summarizes the application of reverse thinking in the teaching of higher education technology field.

By studying the Kerberos authentication scheme, an improved authentication scheme is raised, which is based on Dynamic Password Method. In the improved scheme, user’s password can be effectively protected, and the authentication is double between users and severs. Also, the scheme can resist jacking connection attack. The improved scheme is more secure and more practical than the original one.