package com.example.test.security; import com.sun.org.apache.xml.internal.security.utils.Base64; import javax.crypto.Cipher; import javax.crypto.spec.SecretKeySpec; import java.io.UnsupportedEncodingException; public class test { // DES加密算法,key的大小必须是8个字节 public static void main(Strin...
importjava.util.Scanner;publicclassHillCipher{privateint[][]keyMatrix;// 生成密钥矩阵的方法publicvoidgenerateKeyMatrix(Stringkey){intlength=(int)Math.sqrt(key.length());keyMatrix=newint[length][length];intk=0;// 填充密钥矩阵for(inti=0;i<length;i++){for(intj=0;j<length;j++){keyMatrix[...
HillCipher 希尔密码 选择的实现将内部结构[[a,b],[c,d]]用于矩阵(键),将[[a],[b]]用于消息解析中所需的向量,以匹配的视觉表示。 Hill Cipher中使用的线性代数。 但是,这可以通过对矩阵进行相同的数学运算来实现,方法是[a,b,c,d],将列表长度强制为4,然后对消息文本进行成对解析。 将来以编程方式,这...
Optional: extra credit (5 marks)If youre in for a little extra challenge, attempt to cryptanalyse the 2 2 Hill cipher as follows. Recallthat the attack on the Hill cipher weve seen in class is, at its core, a known-plaintext attack. Since wedont know the plaintext, we have to ...
SecretKeySpec secretKeySpec =newSecretKeySpec("HILLBILLWILLBINN".getBytes(),"AES"); Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); IvParameterSpec iv =newIvParameterSpec(newbyte[16]); cipher.init(2, secretKeySpec, iv);
2. Caesar Cipher C, C++, Java, Python 3. Columnar Transposition Cipher C, C++, Java, Python 4. Diffie - Hellman Algorithm Python 5. Elgamal Cryptosystem C, C++, Java, Python 6. Hill Cipher C, C++, Java, Python 7. Homophonic Substitution C, C++, Java, Python 8. Morse Code C, C++...
SecretKeySpec secretKeySpec = new SecretKeySpec("HILLBILLWILLBINN".getBytes(), "AES"); Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); IvParameterSpec iv = new IvParameterSpec(new byte[16]); cipher.init(2, secretKeySpec, iv); ...
SecretKeySpec secretKeySpec =newSecretKeySpec("HILLBILLWILLBINN".getBytes(),"AES"); Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); IvParameterSpec iv =newIvParameterSpec(newbyte[16]); cipher.init(2, secretKeySpec, iv);
String cipher=cc.getCipher(text); System.out.println("密文:" +cipher); System.out.println("解密" +cc.getPlain(cipher)); } } 结果如下: 明文:Java is the best language in the world!密文:Neze$mw$xli$fiwx$perkyeki$mr$xli${svph%解密Java is the best language in the world!
SecretKeySpec secretKeySpec = new SecretKeySpec("HILLBILLWILLBINN".getBytes(), "AES"); Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); IvParameterSpec iv = new IvParameterSpec(new byte[16]); cipher.init(2, secretKeySpec, iv); ...