Based on the reasonable hypothesis about the motion of targets,an asynchronous firing algorithm suitable for aerocannon s antiaircraft firing is deduced through the aiming vector scheme of antiaircraft firing for an on-board aerocannon.

The rotation of the earth considered,the pointing parameter of a certain projectile intercepting,theaerially,another projectile in a different place after the pointing time τ can be determined through a study on ground asynchronous projectile interception given.

Security proofs of the 2~m-root identification scheme under concurrent attacks;

The experimental results demonstrate the algorithm has great robustness and unperceptiveness and can efficiently against temporal synchronization attacks and content.

Special attention is paid to the synchronization attacks, which can destroy most audio watermarking schemes with very low cost.

Synchronization attacks have more resistance than simple ones, because synchronization attacks will destroy the information-bearing data and the watermark synchronization.

Unlike traditional image watermarking, video watermarking has to deal with extra attacks, such as temporal synchronization attacks, including frame dropping, frame insertion and frame transposition, etc.

In this paper,a new robust digital audio watermark- ing algorithm against desynchronization attacks is proposed, in which the audio statistic characteristics and synchronization code are utilized.

In this paper,a new robust image watermarking scheme against desynchronization attacks is proposed.

A new robust digital audio watermarking against desynchronization attack using DWT and DCT was proposed.