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在第二次世界大戰結束之前,人們研究的方向是如何以更多的替換以及位移來防止密碼字典或加密機制外洩,但增加更多的替換以及位移勢必會增加進行加密以及解密的難度,也會增加操作員失誤的可能,因此當時的德軍發明了進行加解密專用的機器 — — 「謎」。「謎」式密碼機,或稱啞謎機、恩尼格瑪密碼機,在1940年代被德軍大量使用。「謎」有著幾個重大的進展,除了用機器來取代人力進行運算以外,另一個重點在於密碼已經沒辦法單純用觀察單字的方法解回來了。(Wikipedia:恩尼格瑪密碼機)
Before the end of World War II, people studied how to use more substitutions and transpositions to prevent password dictionary or encryption methods from leaking. However, increasing more substitutions and transpositions definitely increases the difficulty of encryption and decryption, and also the possible mistakes of a operator. Therefore, German military invented the Enigma, a machine for decryption.Enigma was largely used by German military in the 1940s. Enigma has several significant developments. Besides using machine to substitute human calculation, the other point is that the ciphertext cannot be decrypted by simply observing words.(Wikipedia: Enigma machine)
二戰後計算機(也就是電腦)與電子學的發展促成加密方式的改變。由於電腦可以對任何儲存在其中的資料加密,且多數電腦的加密都是在二進位字串上操作,不像古典密碼學是直接作用在原始字母、數字,以語言學為基礎的破密術因此失效。不使用頻率分析來破解一個訊息需要知道目前是使用何種加密法,因此才會促成了諜報、賄賂、竊盜或背叛等行為。直到十九世紀學者們才體認到加密法的演算法並非理智或實在的防護。
The computer after World War II and the development of Electronics contributed to the transformation of encryption methods. Unlike Classical Cryptography, which directly acts on the original alphabets and numbers, computers can encrypt any data saved, and mostly on binary word string, thus breaking the ciphers by Linguistics has become ineffective.Breaking a message without using frequency analysis essentially required knowledge of the cipher used, thus making espionage, bribery, burglary, defection, etc.. It was finally explicitly recognized in the 19th century that secrecy of a cipher's algorithm is not a sensible nor practical safeguard of message security.
如果資料庫裡存有我們的密碼,那麼負責管理資料庫的人不就可以看見嗎?或者資料庫被入侵,入侵者也可以全部看見。我們費盡心思保護的密碼就這樣輕易被人看光 — 這樣對嗎?當然不對,這就是為何我們需要「加密」我們用密碼學,一門在探討資訊保密、傳遞、驗證⋯等的學問,對密碼做一些特殊的處理,將密碼從原本的明文變成大家看不懂的密文,然後才將密碼傳送出去,存入資料庫。如此一來,就算有辦法查看資料庫,或者是有人在中途攔截我們傳出的資料,也只能看到加密後那一串沒有意義的密文,無法得知真正的密碼。
If our passwords are saved in the database, does it mean the administrator of the database can see our passwords?Or if the database is hacked, the intruder can also see them. The passwords that we tried hard to protect are seen by others so easily. Is that correct?Of course not. That's why we need "Encryption."We utilize Cryptography, a knowledge investigating information security, transmission, validation...and so forth, to process the passwords from plaintext to Ciphertext / Cyphertext which no one understands, and then send the passwords out and save into the database.Therefore, even if some people are able to access to the database, or to intercept the information we delivered, they can only see the meaningless Ciphertext / Cyphertext encrypted, not the real passwords.
密碼學可分為古典密碼學與現代密碼學,我們先來看看比較平易近人(?)的古典密碼學。古典密碼學主要採用兩種方式:替換與移項。替換式密碼又稱取代加密法,是一種按規律將文字加密的方式。替換式密碼中可以用不同字母數為一單元,例如每一個或兩個字母為一單元,然後再作加密。密文接收者解密時需用原加密方式解碼才可取得原文本。由於拼音文字中字的組成為有限的字母,以英語為例只有26個字母,組成可能的單元數較少,因此使用替換式密碼相對較為容易,而且亦可使用簡單機械進行加密;
Cryptography can be categorized as Classical Cryptography and Modern Cryptography. Let's take a look at Classical Cryptography, which seems more friendly(?).Classical Cryptography uses mainly two methods, substitution and transposition.A substitution cipher is also called substitution encryption, which is a method to encrypt letters systematically.Different alphabets can be used as a unit In a substitution cipher, for example, each one or two alphabets as a unit, and then encrypt them. Receivers need to decipher the ciphertext with the same encrypting methods to get the original text. Since the alphabets in a phonogram are limited, for example, only 26 alphabets in English, the number of possible combinations is relatively small. Therefore, using a substitution cipher is relatively easy, and it is also possible to use simple machines to encrypt.
相反,非拼音文字如中文則因單元數非常大難以使用一般加密方式,必需建立密碼本,然後逐字替換。更何況某些非拼音文字中字字皆由不同大小的字根來組字,較難轉換,因此使用替換式密碼的示例比較少。(Wikipedia:替換式密碼)採用替換的方法中,一個知名的加密法是是以羅馬共和時期的凱薩大帝命名的凱薩加密(Caesar Cipher),當年凱薩曾用此方法與他的將軍們聯繫。
On the contrary, the number of units in non phonograms, such as Chinese, is too huge to use normal encryption methods. It needs to create a cipher pad, and substitute them word by word. Further, some non phonogram languages use different sizes of roots to create words and are difficult to substitute, so there is less examples of substitution ciphers.(Wikipedia: Substitution cipher)On of the famous substitution encryption is Caesar Cipher, named after Julius Caesar in the Roman Republic. Caesar used to use this methods to communicate with his generals.
在密碼學中,愷撒密碼,或稱愷撒加密、愷撒變換、變換加密,是一種最簡單且最廣為人知的加密技術。它是一種替換加密的技術,明文中的所有字母都在字母表上向後(或向前)按照一個固定數目進行偏移後被替換成密文。例如,當偏移量是3的時候,所有的字母A將被替換成D,B變成E,以此類推。(Wikipedia:凱薩密碼)偏移量為3的英文字母對應這是一個很簡單的方法,也非常容易被破解。凱薩加密破解 — — 窮舉法示例(Wikipedia)
In Cryptography, Caesar cipher, also known as Caesar's cipher, is a simple and well-known encryption. It is a type of substitution cipher in which each letter in the plaintext is replaced by a letter some fixed number of positions down the alphabet. For example, with a left shift of 3, A would be replaced by D, B would become E, and so on.(Wikipedia: Caesar cipher)The English alphabets with a left shift of 3It is a simple method, and is easily broken.Breaking the Caesar cipher, an example of Brute-force attack (Wikipedia)
舉例來說,若我們得到一串密文:「exxegoexsrgi」,就算不曉得其採用的偏移量,我們也可以列出所有可能性。陳列出所有可能性後,我們就能找出其中有構成意義的那項,得知它的意思。像這個例子,列出密文以及其二十五個偏移量的結果後,我們可以推出其採用的偏移量為4,原始明文為「attackatonce」,斷字應為attack at once,意即「馬上攻擊」。
Give an example that if we receive a line of ciphers "exxegoexsrgi," we are able to list all the possibilities even if we don't know the shift value.After listing all the possible shifts, we can find out the valid one and acquire its meaning.In this instance, after listing the ciphertext and the 25 possible shifts, we can presume that the shift is four. The original plaintext is "attackatonce," and the word-break should be attack at once.
當密文長度足夠,也可以採用「頻率分析」。先計算密文中每個字母出現的頻率,再將此頻率與正常情況下該語言的字母出現頻率比較。例如,在一般的英文中,E和T出現的頻率特別高,而Q跟Z的出現頻率特別低,我們可以透過計算密文中的字母出現率,推估正確的偏移量。頻率分析不只可應用於字母,也可用在單詞。例如,英文中,出現頻率最高的單詞有the、of、and⋯⋯等等,我們可以將這些單詞的二十五種偏離量的密文編成字典,以此對密文進行分析。
If the ciphertext is long enough, "frequency analysis" is also a technique. First, graph the frequencies of letters in the ciphertext, then match those letters to the expected distribution of them in the original language of the plaintext. For example, in the English language the plaintext frequencies of the letters E, T, and Q, Z are particularly distinctive. It is possible to determine the shift by examining the resultant frequency of the alphabets in the ciphertext. Frequency analysis can not only be applied to alphabets, but also to words. For example, the most commonly used words in English are "the", "of", "and"...etc. We can make a dictionary of those words with 25 different shift parameters, to analyze the ciphertext.
Sherlock Holmes柯南・道爾所著的知名偵探小說《福爾摩斯》,其主角夏洛克・福爾摩斯曾經在短篇〈跳舞的人〉(The Adventure of the Dancing Men)中使用這個方法。事件中出現許多用跳舞人的圖畫傳達的訊息,福爾摩斯以英文中使用頻率最高的字母為E推出什麼動作的跳舞人代表E,再以此去推出其它字母,破解了跳舞人的密語。移項式密碼與替換式不同,字母本身不會變化,但字母順序依循一個規則移動、改變。
"Sherlock Holmes," the famous detective fiction written by Conan Doyle, has used this technique in the short story "The Adventure of the Dancing Men."In the incident, the message is conveyed by many dancing figures. Holmes determines the dancing figure represents of E by knowing that the most frequently used alphabet in English is E, and then determines other alphabets to crack the code of the dancing men.Transposition is different from substitution. The alphabets themselves are not changed, but the order of the alphabets is moved and changed according to a regular system.
中國式密碼是一種移項式密碼,將訊息的字母由右而左、上下交替排列,最後將排列出的結果從左到右,一列一列寫出,成為密文。例如我們現在要來加密「The rabbit is cute.」這個句子,就將句中的字母依序由上寫到下,第二行則由下寫到上,第三行再由上往下寫,以此類推。 — The rabbit is cute.最後寫出每一列的文字,成為密文「UCBBT TSIAH EITRE」。絕大多數的移位式密碼都採用與之類似的手法,重新排列字母的行或列,然後有系統地移動字母。
Chinese cipher is a type of a transposition cipher. The letters of the message are written from right to left, down and up columns to scramble the letters. Then, starting in the first row, the letters are taken in order to get the new ciphertext.For example, if the message needed to be enciphered is "The rabbit is cute," then we write the alphabets from up to down, and the second column from down to up, the third column from up to down, and so on.The rabbit is cute.At last, we write the whole alphabets in each row as "UCBBT TSIAH EITRE."Most transposition ciphers use similar methods to rearrange the row or column of the alphabets, and the move the alphabet systematically.
从大阪新干线到东京后如何到酒店? 从酒店如何到东京成田机场?
大阪から新幹線を使って東京駅に到着した後、ホテルにどうやって行ったらいいですか?ホテルからどうやって東京成田空港に行ったらいいですか?
“Happy Turn” (Rice cracker) with consommé taste!Happy Turn is a popular snack often eaten in Japan. Sweet powder is added to rice snack and it is the tasty snack where you would love to eat all the time. It is the consommé taste of this popular snack.It is an oval and crispy senbei!The characteristics of Happy Turn is that seasoning powder with unique flavor is added to the long and oval senbei. This seasoning powder is named "Happy powder".Popular sweet that has been sold for a long time in Japan.Since its start of sale in Japan in 1976, it is a very popular sweet that has been loved by Japanese people for a long time.Power by magic!
「Happy Turn」(米果)法式清湯口味!Happy Turn是在日本相當受歡迎的零食。在米果中加入甜粉,不管什麼時候都想吃的美味零食。這是法式清湯口味的人氣零食。橢圓形的酥脆仙貝!Happy Turn的特點是長橢圓的仙貝中加入特殊口味的調味粉。調味粉的名字叫做「Happy powder」(快樂粉)。這款人氣甜食在日本販售已經有一段歷史了。從1976年販售開始,它一直都是日本人所喜愛的超人氣甜食。魔法的力量!
The sweet powder put around rice cracker is sometimes called "powder of magic" among fans since people tend to want to eat it repeatedly.
在米果周圍撒上的甜粉,由於會讓人想要一吃再吃,因此有時也被粉絲稱作「魔法之粉」。
本日「totals3」にバージョンアップをしたのですが、日本語が使用できませんいつから使用できるようになりますか?Appstoreの紹介では日本語対応も記載されていたためバージョンアップしたのですが、アプリケーション内で日本語を選択できませんでしたこれまでtotals2を日本語で使用していて、databaseをtotals3に読み込むこともできません。日本語未対応、totals2の日本語データベースが使用できないのであれば返金をお願いしたいです。ご返答よろしくお願いいたします
I updated "totals3" today, but I cannot use it in Japanese.When will the Japanese version come out?I updated it because the introduction in the Appstore shows that there is Japanese version, but I cannot select Japanese inside the app.I have been using totals2 in Japanese before, and the database cannot be read by totals3.if there is no Japanese version, and the Japanese database cannot be applied to totals3, I would like to ask for return of the payment.Please kindly reply.
書類を作成頂き、ありがとうございました。しかし、出品許可申請を断られてしまいました。要件を満たしていないと判断された理由や審査基準、審査内容、審査結果の理由は開示できないとのことです。(請求書は最低限必要な書類とのことです。)もう支払いをしてしまいましたが、今回の取引はキャンセルさせて頂けないでしょうか。お手数お掛けして申し訳ございません。今回は残念な結果に終わりましたが、まだあなたからたくさん商品を買いたいと思っています。今後もあなたと私のビジネスを継続していきましょう。
We deeply appreciate your effort to make the documents.However, we declined the application for selling goods.The reason is that it did not fulfill the requirements and we cannot disclosure the the standards, contents, and the results of the judgement. (The invoice is the minimum necessary document.)Although the payment is already finished, we are asking that if you could cancel the dealing this time? We apologize for the inconvenience.Although the result this time is disappointed, we would still like to purchase products from you next time. We are looking forward to continuing business with you in the future.
こんにちは。日本に住んでいる〇〇と言います。あなたのWEBサイトを何度か利用させて頂いているのですが、添付した画像の様にアラートが出てしまい注文を完了することが出来ません。前回まではこの様なメッセージが出る事はありませんでした。どうしたら良いでしょう?仕事で必要な商品ですので急いでいます。お支払いはペイパルでも可能です。お返事お待ちしております。また、可能でしたらいくつかのサンプルを付けて頂けると助かります。ご検討をお願いします。
Hi, my name is 〇〇, and I live in Japan. I have used your website several times, but error occurred this time as shown in the attached photo, so I cannot finish the order. The message has not shown up before. What should I do? I am in a hurry because I need the product for business. I can also pay by PayPal. I am waiting for your response .Still, please attach some samples if possible. Thank you.