In the previous section, we mentioned the Morse code, and in this extra article, let's talk about the Morse code form, note that this is just talking, only representing personal views and not public opinions, please don't spit if you say something wrong.

Morse code is not unfamiliar to us ordinary people, we can know from the last two words - he is a kind of password, but what kind of password it is, many people may want to know but do not know where to start to understand, some people may have looked up the Morse code on the Internet out of hobby, and the result is a graph that claims to be the Morse code, so is he the Morse code? What exactly is Morse Code used for?

Let's take a few simple examples, such as a World War II TV series or movie we watched, in which two righteous people were locked in two cells separated by only one wall, and in order to pass on the message, they used Morse code to knock on the wall, and for example, two agents who love each other can't clearly express their thoughts about each other for the needs of struggle, so they can only choose to use Morse code to knock something to convey their thoughts to each other. From various TV shows and movies, we might guess that the Morse Code is a way to hit anything to pass on information (and it's very subtle and very stealthy).

Is that the case? Let's take a look at what Morse code is: Morse code, also translated as Morse code, is a time-on and intermittent signal code, which expresses different English letters, numbers and punctuation marks through different arrangement sequences, and it is composed of five audio signals of different lengths to form 0-9 numbers and 26 English letters. Originally they were created for commerce and information exchange, then developed in wars and disappeared into modern times, and the modern Morse code is only used '.' And '-', now we return to the first question, the Morse code atlas we found on the Internet is indeed the Morse code, but not in the war era but in the present unified standard.

In wartime, it can be said that when the two sides balance forces, the decisive factor is often intelligence, and in ancient and modern times, China and foreign countries often play a decisive role in all wars in which less wins more. Then there is a necessary profession of espionage that is disgusting in wartime and admired in peacetime, and the password is one of the most ideal means for them to transmit information, so the password first has security, followed by concealment, and again narrowness, accuracy, what is security, security is in case the enemy gets the password passed by these spies, but they can't understand what the password is saying, in other words, the password is to use a specific language to replace the language we usually use, Only by passing on a language that both sides can understand, just like the language of communication between us and the computer, C language, can only be used when we talk to the computer, usually two people do not use C language for conversation, concealment: in any international law, spies are not recognized as combatants, if not concealed, then there is a danger of leaking secrets and personal safety at any time, narrow-mindedness: the group of people who use passwords is often only an organization, and this organization knows how to decipher the password is only a few codebreakers, Narrowness is mainly mentioned in the word 'secret', accuracy: a password is a point-to-point information transmission, and the right or wrong of this information will generally affect the lives of tens of thousands of people, so he must be accurate.

So under what circumstances they not only improve the accuracy of the intelligence but also ensure the security of the intelligence, that, the password used in the war is these five audio signals of different lengths, maybe everyone has seen the introduction of these five different audio signals on the Internet but is not very clear, now I use the doorbell as an analogy, the first signal is to press a doorbell hand immediately release, the second signal is to press the doorbell when the hand stays on the doorbell for 1 second to prolong the ringing of the doorbell, The third signal is that the hand stays on the doorbell for 3 seconds when the doorbell is ringed, and then prolongs the ringing of the doorbell, and so on, these five signals indicate the dot, the stroke, the pause between the dot and the stroke, the medium pause between each word, and the long pause between sentences. It is a cumbersome language, and each dot, a dash, and a word made up of dots can be used to represent different meanings, such as '. . . - 'It can represent the English alphabet 'A', or it can represent the Japanese 'あ', but in daily life they rarely use passwords to directly replace the pinyin letters, because the English alphabet is only 26 even if it is only 50 in Japanese, and he has no security at all, so the password is directly replaced by a fixed combination of a certain word, we give an example of omitting pauses, such as 'dot' is '1', stroke is '2', then we set '112' when we first set the password to represent ' Ren', '122' represents 'business', '2112' represents 'success', '2122' represents 'gong' (no study pause), these settings are only known to us, then the password we received is 112, 122, 2112, 2122 It means that the task is successful, since the password is a language, he can't just express a fixed few words, so at this time there is a codebook written with a fixed code, like the example we gave above, Each word has a fixed code, so take Chinese characters as an example, the first level of Chinese characters is 21303, that is to say, there are 21303 fixed codes, which is equivalent to creating 21303 difficulties for the enemy, such a set of fixed codes with such a large number of ordinary people, not to mention that even geniuses may not be able to memorize it, not to mention that you have to find at least two geniuses in war, even if they can memorize the codebook, I don't think any organization will let a codebook with long legs wander around the world, So in TV series or movies, I can only 'hehe' people who use Morse code to talk to, but it should be no problem for Morse code to send an alarm or something, for example, someone at sea uses lights to emit Morse code, usually the SOS we are familiar with is a fixed Morse code for help at sea, and for example, the knock on the door that we often see in TV series is actually a simple Morse code, two short and one long are their own people, three long and two short people finish playing, of course, some people will also refer to them collectively as code words.

Nowadays, we can actually use this voice to formulate a code word that only each other knows to promote the relationship between us, such as a young couple, when the woman is in charge at home, but when you go out for the face of your husband, then you have to listen to the husband for everything, but it is still up to the woman to control the proportion, when the man says something wrong, the woman quickly knocks on the table twice and tells him' Shut up', if the man is still talking, the woman can knock on the table twice and then pause for a while to knock again, meaning to tell him, 'I'm going to kill you'.