java明文密碼三重加密方法

本文介紹了兩種密碼加密的方法，這兩種很常見可以再百度隨意找到。

1.摩斯密碼；

說道密碼加密不得不提的方法。很是經典。

首先說一下他的對照表，直接上圖。

核心思想就是替換明文密碼，將字符對應的替換成-與.兩種符號的組合；

2、柵欄密碼；

所謂柵欄密碼，就是把要加密的明文分成N個一組，然後把每組的第1個字連起來，形成一段無規律的話。 不過柵欄密碼本身有一個潛規則，就是組成柵欄的字母一般不會太多。 （一般不超過30個，也就是一、兩句話）

這個沒有什麼好說的了，舉個栗子：對明文ASDFGHJKL進行加密;分成兩組：基數位置一組，偶數位置一組。然後兩組合併成ADGJLSFHK；

我對這兩種加密方式進行了結合，對一個明文密碼進行了三重加密：第一層柵欄一次，第二層再柵欄一次，第三層再一次摩斯加密；
先是柵欄部分：

 /*柵欄解密解密類*/public class Fence { /*加密部分*/ public String encryption (String password){ String p = new String(); String p1 = new String(); String p2 = new String(); for (int i = 0; i < password.length(); i++){ if(i%2 == 0) p1 += p.valueOf(password.charAt(i)); else p2 += p.valueOf(password.charAt(i)); } return p1+p2; } /*解密部分*/ public String decode(String FencePassword){ String password = new String(); String p = new String(); String p1 = FencePassword.substring(0, FencePassword.length()/2); String p2 = FencePassword.substring(FencePassword.length()/2); int i; for (i = 0; i < p1.length(); i++){ password += p.valueOf(p1.charAt(i)) + p.valueOf(p2.charAt(i)); } if(FencePassword.length()%2 != 0) password += p.valueOf(p2.charAt(i)); return password; }}

然後是摩斯部分：
這一部分比較繁瑣，在於摩斯密碼與符號之間的匹配問題上，想著用一個數組去存儲，然後循環進行匹配；但是我是一個不怕麻煩只求簡單的一個人，就進行了一個個的比較；
然後在摩斯加密解密的時候進行了兩次的柵欄加密解密；這樣用到加密解密的時候只要調用摩斯類的加密解密函數即可。

 /*摩斯加密解密類*/import java.util.StringTokenizer;public class Morse { /*摩斯密碼與字符之間的匹配常量*/ final String A = ".-"; final String B = "---."; final String C = "-.-."; final String D = "-.."; final String E = "."; final String F = "..-."; final String G = "--."; final String H = "...."; final String I = ".."; final String J = ".---"; final String K = "-.-"; final String L = ".-.."; final String M = "--"; final String N = "-."; final String O = "---"; final String P = ".--."; final String Q = "--.-"; final String R = ".-."; final String S = "..."; final String T = "-"; final String U = "..-"; final String V = "...-"; final String W = ".--"; final String X = "-..-"; final String Y = "-.--"; final String Z = "--.."; final String $0 = "-----"; final String $1 = ".----"; final String $2 = "..---"; final String $3 = "...--"; final String $4 = "....-"; final String $5 = "....."; final String $6 = "-...."; final String $7 = "--..."; final String $8 = "---.."; final String $9 = "----."; final String period = ".-.-.-"; // . final String colon = "---..."; // : final String comma = "--..--"; // , final String semicolon = "-.-.-."; // ; final String question = "..--.."; // ? final String equal = "-...-"; // = final String doubleQuotation = ".-..-.";// " final String singleQuotation = ".----.";// ' final String slash = "-..-."; /// final String exclamation = "-.-.--"; // ! final String hyphen = "-....-"; // - final String underscore = "..--.-"; // _ final String lroundBrackets = "-.--."; // ( final String rroundBrackets = "-.--.-"; // ) final String $ = "...-..-"; // $ final String ampersand = ".-..."; // & final String at = ".--.-."; // @ final String plus = ".-.-."; // + /*加密對應的匹配*/ public String matching(String str) { switch (str) { case "A": return A; case "B": return B; case "C": return C; case "D": return D; case "E": return E; case "F": return F; case "G": return G; case "H": return H; case "I": return I; case "J": return J; case "K": return K; case "L": return L; case "M": return M; case "N": return N; case "O": return O; case "P": return P; case "Q": return Q; case "R": return R; case "S": return S; case "T": return T; case "U": return U; case "V": return V; case "W": return W; case "X": return X; case "Y": return Y; case "Z": return Z; case "0": return $0; case "1": return $1; case "2": return $2; case "3": return $3; case "4": return $4; case "5": return $5; case "6": return $6; case "7": return $7; case "8": return $8; case "9": return $9; case ".": return period; case ":": return colon; case ",": return comma; case ";": return semicolon; case "?": return question; case "=": return equal; case "/"": return doubleQuotation; case "/'": return singleQuotation; case "/": return slash; case "!": return exclamation; case "-": return hyphen; case "_": return underscore; case "(": return lroundBrackets; case ")": return rroundBrackets; case "$": return $; case "&": return ampersand; case "@": return at; case "+": return plus; } return " "; } /*摩斯加密*/ public String encryption(String password) { Fence f = new Fence(); password = f.encryption(password); password = f.encryption(password); String MorsePasswork = new String(); String mp = new String(); for (int i = 0; i < password.length(); i++) { mp = mp.valueOf(password.charAt(i)); MorsePasswork += matching(mp) + "/"; } return MorsePasswork; } /*解密對應換的匹配*/ public String matching2(String str) { if (str.equals(A)) return "A"; else if (str.equals(B)) return "B"; else if (str.equals(C)) return "C"; else if (str.equals(D)) return "D"; else if (str.equals(E)) return "E"; else if (str.equals(F)) return "F"; else if (str.equals(G)) return "G"; else if (str.equals(H)) return "H"; else if (str.equals(I)) return "I"; else if (str.equals(J)) return "J"; else if (str.equals(K)) return "K"; else if (str.equals(L)) return "L"; else if (str.equals(M)) return "M"; else if (str.equals(N)) return "N"; else if (str.equals(O)) return "O"; else if (str.equals(P)) return "P"; else if (str.equals(Q)) return "Q"; else if (str.equals(R)) return "R"; else if (str.equals(S)) return "S"; else if (str.equals(T)) return "T"; else if (str.equals(U)) return "U"; else if (str.equals(V)) return "V"; else if (str.equals(W)) return "W"; else if (str.equals(X)) return "X"; else if (str.equals(Y)) return "Y"; else if (str.equals(Z)) return "Z"; else if (str.equals($0)) return "0"; else if (str.equals($1)) return "1"; else if (str.equals($2)) return "2"; else if (str.equals($3)) return "3"; else if (str.equals($4)) return "4"; else if (str.equals($5)) return "5"; else if (str.equals($6)) return "6"; else if (str.equals($7)) return "7"; else if (str.equals($8)) return "8"; else if (str.equals($9)) return "9"; else if (str.equals(period)) return "."; else if (str.equals(colon)) return ":"; else if (str.equals(comma)) return ","; else if (str.equals(semicolon)) return ";"; else if (str.equals(question)) return "?"; else if (str.equals(equal)) return "="; else if (str.equals(doubleQuotation)) return "/""; else if (str.equals(singleQuotation)) return "/'"; else if (str.equals(slash)) return "/"; else if (str.equals(exclamation)) return "!"; else if (str.equals(hyphen)) return "-"; else if (str.equals(underscore)) return "_"; else if (str.equals(lroundBrackets)) return "("; else if (str.equals(rroundBrackets)) return ")"; else if (str.equals($)) return "$"; else if (str.equals(ampersand)) return "&"; else if (str.equals(at)) return "@"; else if (str.equals(plus)) return "+"; else return " "; } /*摩斯解密*/ public String decode(String MorsePassword) { String password = new String(); Fence f = new Fence(); StringTokenizer p = new StringTokenizer(MorsePassword, "/"); while (p.hasMoreElements()) { password += matching2(p.nextToken()); } password = f.decode(password); password = f.decode(password); return password; }}

以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持武林網。