With the continuous deepening of the new military reform with information technology as the core, the form of war has gradually entered the local informatization, and the battlefield transparency and precision strike are the most important characteristics that distinguish the informatization war from other wars. As a special weapon, smoke screen is a camouflage method to shield and confuse the enemy. The most basic use is to create visual obstacles to the enemy, so as to achieve the purpose of concealing the military action. In recent years, with the continuous improvement of smoking technology and means, the role of smoke camouflage in information warfare cannot be ignored. The US military has recently put forward a new idea for the smoke weapon system, hoping to develop a new type of smoke that can not only interfere with the enemy's line of sight, but also ensure that its own troops are not affected. So how does this new type of smog work? What strategic significance will it play on the battlefield? How will the US military further invest in its development and research? 1、 The defects and visibility problems of the traditional smoke screen system are usually used in the battlefield for the following purposes: first, shielding, using dense smoke barriers to cover themselves, so that the enemy can not see their real actions, and using the smoke screen to carry out the battle or complete the defensive retreat; The second is confusion. The quick release of smoke can make the enemy fall into a "blind spot" instantly, lose the target and lose the direction; The third is camouflage, using smoke to hide the true and show the false, creating chaos on the battlefield, making it difficult for the enemy to distinguish the true from the false, and making mistakes in judgment; The fourth is positioning, using smoke screen to indicate the direction, mark the important locations of the enemy, lock military targets, and guide fire strikes. Although the effect of the smoke screen weapon is remarkable, its defects and shortcomings can not be ignored: First, it is extremely vulnerable to weather and terrain. For example, heavy rain can speed up the dissipation of smoke, while adverse wind direction may "lift a stone to hit your own foot", which will make smoke help the enemy and cause a counterproductive effect. Special terrain such as forests, rivers and highlands will also reduce the spread depth of smoke; The second is security. Not all components of smoke weapons are harmless, and the release of toxic compounds contained in them may cause damage to the health of our soldiers. Therefore, soldiers in the front line often need to be equipped with various protective equipment to enter the smoke screen, which increases the load and reduces the combat effectiveness to a certain extent; The third point is also the visibility of the smoke screen that most perplexes the armies of various countries. After the smoke screen is released on the battlefield, it cannot be controlled, which will bring great uncertainty. Sometimes, it will not only mislead the enemy, but also confuse itself. After entering the smoke screen, the friendly combat forces will also reduce the visibility and sensor performance, and will also lose direction, affecting the fight. It can be seen that although smoke screen weapons are an important means of defeating the enemy on the battlefield, how to improve them and solve their shortcomings will be the key to greatly improve the military's operational capability and effectively change the battlefield situation. The "coding visibility" plan recently proposed by the Advanced Research Projects Agency (DARPA) of the US Department of Defense aims to develop a new smoke screen system that is more suitable for the battlefield needs and ensures the friendly forces are not interfered with under the conditions of information warfare. 2、 "Code visibility" -- the magic "glass" of unidirectional visibility proposed by the Pentagon to create and adopt new features with unusual functions