Chapter 723 Tropical Fruit

When sailing on the sea, fresh water is the most important material. However, it is not easy to preserve. After a few days, the taste of the water will not be fresh. Drinking it after it stinks may cause illness.

Besides, not eating fresh vegetables for a long time will also cause other problems. The early sailors would prepare a lot of wine in oak barrels, which is not only a kind of enjoyment, but also a substitute for fresh water.

This discovery was not known to the world until the 15th century. Before that, sailing was very dangerous. Even if the crew did not die from pirates and unpredictable weather, they would die from sepsis. Being a sailor was a helpless choice. .

Arriving at the port not only means getting supplies, but also means safety. The key is to get nourished by "love".

Those sailors who came ashore usually "hunted" in the tavern, and as for the high-level, whether they were wealthy merchants or the navy, they were invited to a ball.

This is often the case in port cities. There are opera houses where the nobles can socialize, and taverns where the "lower people" socialize. Places like the post office.

Italian cuttlefish noodles are very famous, that dark dish Pomona has long wanted to eat, but Monica and Alessandro didn't let her order it in Fabio's restaurant.

The Antica Trattoria Poste Vecie restaurant was remodeled from the Venice post office. This place is rarely visited by locals, but mainly tourists.

Everyone knows that things in tourist attractions are bound to be a little more expensive. Fortunately, this restaurant is more authentic, and the seafood is very fresh, but Pomona is not just here for the food. This restaurant has a history of 500 years , which has been like this since the Middle Ages, and the surrounding inn for centuries, reminds Pomona of the Leaky Cauldron.

A good private tour guide must understand the preferences of the guests. Some people like shopping, some people like Renaissance tours, and some people like romance. Monica has never encountered this adventure mode of Pomona herself. She thinks it is novel and fun, but playing Back to playing, money is also to be earned, how can Pomona's money be so easy to earn? She taught Monica and Alessandro how to encrypt a message in a game.

The first known cipher, Caesar's cipher, was used around 58 BC by Julius Caesar, who in his military orders shifted every letter to prevent his enemies from intercepting Caesar's cipher. After the military order, his real intelligence was obtained directly.

Caesar encryption is the simplest encryption method. The two parties to the encryption must first reach a consensus on the displacement number of the letter. For example, if the encrypted displacement number agreed by both parties is 3, then each letter sent must go through 3 displacements, and A becomes becomes D, B becomes E, and C becomes, assuming that the plaintext is "attack", after Caesar encryption with a displacement of 3, it will become "dwwtfn". Then send the encrypted text to the recipient through the sender, so that even if the enemy captures the sender, they will get a bunch of incomprehensible text, and the generals who successfully obtained the cipher text will then send the encrypted text to the recipient. By subtracting 3 from each letter of the text, the real plaintext information can be obtained, and this process is called decryption.

This encryption method was used by the West for hundreds of years until an Arab broke it. Any text in an English book, and then calculate the frequency of each letter, you will find an amazing secret, that is, in English text, the letter with the highest frequency is always e, which is determined by the nature of English text, And the person who wrote the ciphertext doesn't realize that, in cryptography, this is called a fingerprint.

Around the 15th century, someone proposed a multi-table cipher to achieve this purpose. The difference between the multi-table cipher and the Caesar cipher is that it does not use a single number for displacement encryption, but refers to a displacement word. The first step in this encryption method is to determine the displacement word, assuming it is "world", and then convert the word into a number according to the position of the word in the alphabet. The characters of "world" correspond to "21, 15, 18, 12, 4", and then repeat this sequence of numbers in the process of information encoding, and shift the plaintext information according to this sequence of numbers. Suppose the plaintext is "abcde fghij", and the encrypted ciphertext is "vrvqj bwavo". When the ciphertext is sent to the partner, the partner can decrypt the information by subtracting the corresponding displacement according to the secret word agreed in advance. If the ciphertext is intercepted and the eavesdropper counts the frequency of letters used, he will find a flatter distribution and the "fingerprint" will be harder to find.

The word used to encrypt is the key. Once you know the key, you can quickly decipher the ciphertext, but if you don’t know it, it’s not impossible to decipher it. The premise is that the person must be very smart and spend time studying it. Card and Alan Sandro are encrypting according to the key given by Pomona.

A woman is like an encrypted book. Those who have the key can read it quickly, but those who don't know the key can't read it no matter what. If you give up at this point, then he has nothing to do with the secret knowledge.

This restaurant is located diagonally opposite the Fraghetti Art Museum. There is a magical alarm clock near the art gallery. Legend has it that this old alarm clock belonged to a black magic witch who lived nearby and enjoyed using the clock to mark the due time of bills. The house where the witch died had been closed for years and no one wanted to live there.

Many years later people started making jokes about witches and alarm clocks, so the original alarm clock was removed, but after the removal, some disturbing phenomena began to appear. To the original place.

Human beings have curiosity and fear of unknown things. When curiosity overcomes fear, it is the driving force for human progress. When fear overcomes curiosity, people will shrink back. People in middle age often feel that they are afraid of change, because at that time People no longer have the time and energy to make mistakes as they did when they were young.

The post of Doge of Venice was first created in 726, replacing the previous tribunes. The earliest satraps were representatives of the Byzantine Empire, as well as ecclesiastical and military leaders. After Venice gradually developed into an oligarchy, some of the key functions of the Doge were gradually replaced by other officials and the Venetian Parliament, and the Doge became a representative position.

The duties and powers of the governor are not specifically limited, and most of them are held by members of several big families. Early governors-general had their sons hold public office, leading to a tendency for the position to be hereditary. Later, the Republic stipulated that the Governor-General could not nominate his own successor.

After 1172 the election of the Doge was handed over to a Council of Forty elected by the Grand Council of Venice. New rules were introduced in the 1268 election to minimize the influence of individual families in the election. Nine people are selected by lottery in the Great Council, and these nine people choose the forty-one people who actually have voting rights through multiple complicated lottery and election steps, each of which requires a minimum support rate of up to three quarters and at least a majority to pass.

There are also new rules, such as the need for other officials to be present when he opens foreign letters. The governor is also not allowed to own land in foreign countries. After the death of a governor, his political performance will be evaluated, and if there is malfeasance, the parliament will confiscate his estate.

This is mainly due to the influence of the election of the Pope and the Crusades. For a long time, these interest supremacists have not taken God seriously. The Crusades made them see the terrible power of faith. Only after becoming a puppet of the emperor and the church can the drama of opening letters continue to be watched.

There were post stations in ancient China. This kind of information transmission was passed to Persia by envoys. It was mainly used to transmit military information. Later, it was heard that lychees were delivered to Concubine Yang Gui.

The earliest international postal services in medieval Europe were organized by merchant guilds for their members. The first, and perhaps the first, international postal service was the Metzger postal service organized by the German Butcher Guild in the 12th century. One of the additional conditions of opening a butcher shop at that time was to have a horse and undertake the work of carrying mail.

The Metzger Post operated until the end of the 16th century, when it was annexed by the Holy Roman Empire Post. In 1301, the Florentine Cloth Shop Merchants Guild established a postal service to operate postal services from Florence to the main French commodity fairs. Members of the guild paid their postal staff an apportionment.

The monastery post was organized from the beginning of the 12th century to handle postal services between the various monasteries and their general administrations belonging to the Italian and French Grand Orders. Monastery messengers were known as "message messengers", named after the delivery of parchment letters. These envelopes consisted of letters, from one monastery to the next, more and more parchments joined end to end and stitched together. It would take months to carry such a letter for a week, and the letter might be a colossal object by the end of the journey.

At the beginning of the 13th century, postal services were established between universities, and students were divided into several "country" groups, and each "country" group had messengers to maintain regular correspondence with the students' respective motherland and hometown. For example, the predecessor of the University of Paris, Paris Sole The English section of the seminary has sent messengers to London, Oxford, Dublin, Glasgow, Edinburgh, Aberdeen, Bergen, Uppsala, Krakow, Hungary, Bohemia, Moravia, The principalities of Pomerania, Silesia, and Germany. The university post differed from other early postal systems in that they allowed the delivery of private letters to the general public. Revenues from these post offices were used to pay the salaries of teaching staff. Universities in central Europe The post continued until the 18th century.

Of course, military intelligence is accurate, fast, and best encrypted. It would be ideal to provide an express station within 800 miles, but maintaining such a huge postal system requires huge expenses.

Later, these post stations also served part-time for officials to communicate and receive envoys. It was unrealistic to rely entirely on state funding. During the Arab Empire, there were also postal problems. Pigeons were not always safe. In order to transmit information safely, reasonably, and concealedly, human beings can be said to be strangled. Use your brains.

Pomona wouldn't dare to enjoy a meal while someone was chasing them, but they did need a place to sit and write.

Another information center in Venice, Café Flore, Pomona, is no longer planning to go. Women may not be confused by love, but they will still be confused by money, just like the elders are no longer obsessed with women, but still obsessed with power.

The boss will not know what is written in this encrypted letter. He is like a "porter" who doesn't know anything and is only responsible for sending the letter.

Poor Harry Potter.

"Are you done?" Pomona urged the two of them to hand in the papers like a proctor.

"Soon!" Monica and Alessandro said anxiously together.

Pomona shrugged, called the waiter, and ordered three Antica coconut ice cream.

A good boy should be rewarded well. What should I do if Gabrielle Truman gave him a coconut ice cream after he defeated the Ravenclaw prefect? She just loves the taste and can't stop.