4

　　NPNO UO Q YMWDE YNOENOLN WON FWCSG NKINLE EW HUOG UE AWYE WHENO WCE WH

　　HUHENNO YXATWSY UO EMN HUDYE ANYYQZN HWCD FNDN EMN YQAN YW UE FQY

　　DNQYWOQTSN EW YNE EMUY GWFO QY N UE UY EDCN EMQE UO YWAN LQYNY EMN

　　HUZCDN FQY TNQDUOZ Q HSQZ QOG UO YWAN LQYNY OWE TCE UE FQY IDWTQTSN

　　HDWA EMN FQX UO FMULM EMN HSQZY FNDN GUYEDUTCENG EMQE EMNX FNDN CYNG EW

　　TDNQB EMN YNOENOLN CI UOEW FWDGY U QLLNIENG EMUY QY Q MXIWEMNYUY QOG

　　OWENG EMQE N FQY DNIDNYNOENG TX EMN YEULBAQO FUEM TWEM QDAY NKENOGNG CI

　　UO EMN QUD

　　2.U B H X P P R A I L A F X K A E L U F L U L D G A A N V C D U M A K R

　　D U K L X C M A R H X P E U C C B U M K I L D I U I R U M V C H M A D M

　　R F X M A L A O A D I X M F A U E D R F X M G U M F A K I L D I U I E D

　　R D M U M G U I D I U X M E L U F L L A E X P C K M X I O A B P R A R U

　　M F A L A F X P C K M A G A O U M D Y U M A I L D I U I F X P C K F X M

　　A B O X M D M H X M A W P I I L A C D K H D M K R X M H K A D O E D I R

　　X M E A L D G A A M K A K W H I P O M U M Y I L A K D M F U M Y M A M I

　　X Y X X K E L A M I L A H L D G A R X X B I A M W A A M I L A D Y A M I

　　R X B A G U C D M K U I L U M S I L D I U L D G A B P C B U C C A K M H

　　V O X M U R A X B Y U G U M Y H X P R X M A I L U M Y P M P R P D C B X

　　O H X P O M X I A W X X S I L O A A B X O I H U R X P O I O D U M D M K

　　U B D M F H E A R L X P C K W A W D F S U M W D S A O R I O A A I B X O

　　K U M M A O

　　（提示：留意重复出现的连续多个字母，如I L D I。这种方法在解维尔纳斯密码

　　时很有用哦～～～）

　　下面再说说一些常用技巧：

　　1.辨认出E后，能轻易的标出H，因为H常常出现在E前，却很少位于其后；

　　2.Q的后面多是U；

　　3.当一个单词知道其中大部分字母后，不妨查查英文字典（当然，很懂E文的就不

　　用了～～～），如果字典里只有一个单词符合条件时，就会很快的知道其他字母。

　　上面的只是抛砖引玉，希望大家有什么好方法也告诉一下～～～

　　解密或许是个沉闷的过程，但当你找到解法后，又会很兴奋，大家ENJOY一下吧！

　　明天休息，后天再更新吧，偷懒中～～～

　　to be continued......

　　先给出上篇的答案吧：

　　1."Having once recognized, however, that the symbols stood for letters,

　　and having applied the rules which guide us in all forms of secret

　　writings, the solution was easy enough. The first message submitted to

　　me was so short that it was impossible for me to do more than to say,

　　with some confidence, that the symbol [of the stickman with both arms

　　extended up in the air] stood for E. As you are aware, E is the most

　　common letter in the English alphabet, and it predominates to so marked

　　an extent that even in a short sentence one would expect to find it

　　most often. Out of fifteen symbols in the first message, four were the

　　same, so it was reasonable to set this down as E. It is true that in

　　some cases the figure was bearing a flag, and in some cases not but it

　　was probable, from the way in which the flags were distributed, that

　　they were used to break the sentence up into words. I accepted this as

　　a hypothesis, and noted that E was represented by [the stickman with

　　both arms extended up in the air]

　　明码表 A B C D E F G H I J K L M N O P R S T U V W X Y

　　5

　　密码表 Q T U G N H Z M U R B S A O W I D Y E C P F K X

　　解答者：drhorse，菩提

　　（这篇的难点是E以特殊的形式出现，令单字母单词有三个）

　　2."If you use the code which I have explained," said Holmes, "you will

　　find that it simply means 'Come here at once.' I was convinced that it

　　was an invitation which he would not refuse, since he could never

　　imagine that it could come from anyone but the lady. And so, my dear

　　Watson, we have ended by turning the dancing men to good when they

　　have so often been the agents of evil, and I think that I have

　　fulfilled my promise of giving you something unusual for your

　　notebook. Three-forty is our train, and I fancy we should be back in

　　Baker Street for dinner."

　　明码表 A B C D E F G H I K L M N O P R S T U V W X Y

　　密码表 D W F K A B Y L U S C M M X V O R I P G E N H

　　解答者：hoon

　　（这篇的难点是M既替换N，又是本身，这是后来一些编码师用来迷惑破译者而设

　　的陷阱）

　　自从频率分析法出现后，单字母替换密码完全失去了效用。因此，密码编码者想

　　方设法去编一种更强大的密码。一些编码者对单字母替换密码做了一些改动，如

　　在编码过程中，加入一些特殊的字符，或者令一些字母不代表另一个字母，而是

　　代表一种程式，譬如是代表空格，代表删去前一个字母，代表换行等。但这一切

　　起的作用并不大，聪明的破译师仍然能在里面找到许许多多破译密码的线索。直

　　到有一天，佛罗伦萨的里昂巴蒂斯特