<p>A calculation method for a secure clock is disclosed. The method includes the following steps: when the television (TV) programs protected by Digital Rights Management (DRM) are watched, a terminal calculates a secure clock according to the difference between the latest obtained two TV clocks, the difference between the latest recorded two boot times and the obtained DRM time. A terminal is also disclosed in the present invention. With the technical solutions of the present invention, the secure clock of the terminal can be simply and rapidly updated.</p>
