rail_deviceid_C和C ++中的Rail Fence密码程序[加密和解密]

- 日理万妓 2022-12-07 13:54 118阅读 0赞

![9377685bf9f32a79982d16194919472a.png][]

rail\_deviceid

Here you will get rail fence cipher program in C and C++ for encryption and decryption.

在这里，您将获得用于加密和解密的C和C ++的Rail fence密码程序。

It is a kind of transposition cipher which is also known as zigzag cipher. Below is an example.

这是一种换位密码，也称为之字形密码。 下面是一个例子。

![Rail Fence Cipher Example][]

Here Key = 3. For encryption we write the message diagonally in zigzag form in a matrix having total rows = key and total columns = message length. Then read the matrix row wise horizontally to get encrypted message.

这里的Key =3。为进行加密，我们将消息对角地以Z字形写在矩阵中，该矩阵的总行数=密钥，总列数=消息长度。 然后水平读取矩阵行以获取加密的消息。

## C语言的围栏密码程序 **(**Rail Fence Cipher Program in C**)** ##

#include<stdio.h>
    #include<string.h>
     
    void encryptMsg(char msg[], int key){
        int msgLen = strlen(msg), i, j, k = -1, row = 0, col = 0;
        char railMatrix[key][msgLen];
     
        for(i = 0; i < key; ++i)
            for(j = 0; j < msgLen; ++j)
                railMatrix[i][j] = '\n';
     
        for(i = 0; i < msgLen; ++i){
            railMatrix[row][col++] = msg[i];
     
            if(row == 0 || row == key-1)
                k= k * (-1);
     
            row = row + k;
        }
     
        printf("\nEncrypted Message: ");
     
        for(i = 0; i < key; ++i)
            for(j = 0; j < msgLen; ++j)
                if(railMatrix[i][j] != '\n')
                    printf("%c", railMatrix[i][j]);
    }
     
    void decryptMsg(char enMsg[], int key){
        int msgLen = strlen(enMsg), i, j, k = -1, row = 0, col = 0, m = 0;
        char railMatrix[key][msgLen];
     
        for(i = 0; i < key; ++i)
            for(j = 0; j < msgLen; ++j)
                railMatrix[i][j] = '\n';
     
        for(i = 0; i < msgLen; ++i){
            railMatrix[row][col++] = '*';
     
            if(row == 0 || row == key-1)
                k= k * (-1);
     
            row = row + k;
        }
     
        for(i = 0; i < key; ++i)
            for(j = 0; j < msgLen; ++j)
                if(railMatrix[i][j] == '*')
                    railMatrix[i][j] = enMsg[m++];
     
        row = col = 0;
        k = -1;
     
        printf("\nDecrypted Message: ");
     
        for(i = 0; i < msgLen; ++i){
            printf("%c", railMatrix[row][col++]);
     
            if(row == 0 || row == key-1)
                k= k * (-1);
     
            row = row + k;
        }
    }
     
    int main(){
        char msg[] = "Hello World";
        char enMsg[] = "Horel ollWd";
        int key = 3;
     
        printf("Original Message: %s", msg);
     
        encryptMsg(msg, key);
        decryptMsg(enMsg, key);
     
        return 0;
    }

**Output**

**输出量**

*Original Message: Hello World* *Encrypted Message: Horel ollWd* *Decrypted Message: Hello World*

*原始消息：Hello World* *加密消息：Horel ollWd* *解密消息：Hello World*

## C ++中的Rail Fence密码程序 **(**Rail Fence Cipher Program in C++**)** ##

#include<iostream>
    #include<string.h>
     
    using namespace std;
     
    void encryptMsg(char msg[], int key){
        int msgLen = strlen(msg), i, j, k = -1, row = 0, col = 0;
        char railMatrix[key][msgLen];
     
        for(i = 0; i < key; ++i)
            for(j = 0; j < msgLen; ++j)
                railMatrix[i][j] = '\n';
     
        for(i = 0; i < msgLen; ++i){
            railMatrix[row][col++] = msg[i];
     
            if(row == 0 || row == key-1)
                k= k * (-1);
     
            row = row + k;
        }
     
        cout<<"\nEncrypted Message: ";
     
        for(i = 0; i < key; ++i)
            for(j = 0; j < msgLen; ++j)
                if(railMatrix[i][j] != '\n')
                    cout<<railMatrix[i][j];
    }
     
    void decryptMsg(char enMsg[], int key){
        int msgLen = strlen(enMsg), i, j, k = -1, row = 0, col = 0, m = 0;
        char railMatrix[key][msgLen];
     
        for(i = 0; i < key; ++i)
            for(j = 0; j < msgLen; ++j)
                railMatrix[i][j] = '\n';
     
        for(i = 0; i < msgLen; ++i){
            railMatrix[row][col++] = '*';
     
            if(row == 0 || row == key-1)
                k= k * (-1);
     
            row = row + k;
        }
     
        for(i = 0; i < key; ++i)
            for(j = 0; j < msgLen; ++j)
                if(railMatrix[i][j] == '*')
                    railMatrix[i][j] = enMsg[m++];
     
        row = col = 0;
        k = -1;
     
        cout<<"\nDecrypted Message: ";
     
        for(i = 0; i < msgLen; ++i){
            cout<<railMatrix[row][col++];
     
            if(row == 0 || row == key-1)
                k= k * (-1);
     
            row = row + k;
        }
    }
     
    int main(){
        char msg[] = "Hello World";
        char enMsg[] = "Horel ollWd";
        int key = 3;
     
        cout<<"Original Message: "<<msg;
     
        encryptMsg(msg, key);
        decryptMsg(enMsg, key);
        
        return 0;
    }

Comment below if you have queries related to above rail fence cipher program in C and C++.

如果您对上面的C和C ++围栏密码程序有疑问，请在下面评论。

> 翻译自: [https://www.thecrazyprogrammer.com/2017/09/rail-fence-cipher-program-in-c.html][https_www.thecrazyprogrammer.com_2017_09_rail-fence-cipher-program-in-c.html]

rail\_deviceid

[9377685bf9f32a79982d16194919472a.png]: /images/20221123/f66d91948d5f45ea8d46e96b738e99d4.png
[Rail Fence Cipher Example]: /images/20221123/6e41ef80782a4687a9164c7ef5e6246b.png
[https_www.thecrazyprogrammer.com_2017_09_rail-fence-cipher-program-in-c.html]: https://www.thecrazyprogrammer.com/2017/09/rail-fence-cipher-program-in-c.html