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74 lines
2.1 KiB
Java
74 lines
2.1 KiB
Java
/*
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This is a java program to encrypt a matrix using a key. The key is hidden and kept secret and
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inverse copy of the key is provided to the receiver, with which he/she can decrypt the matrix.
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The operation performed is matrix multiplication.
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*/
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//This is sample program to encode any 2-dimensional matrix using matrix of elememts (i+j)
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// for 2x2 encoding is done by multiplying given matrix with 0 1
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// 1 2
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import java.util.Scanner;
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public class Encoding_Matrix
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{
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public static void main(String args[])
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{
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int n;
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Scanner input = new Scanner(System.in);
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System.out.println("Enter the base of squared matrices");
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n = input.nextInt();
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int [][] a = new int[n][n];
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int [][] b = new int[n][n];
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int [][] c = new int[n][n];
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System.out.println("Enter the elements of matrix to be encoded: ");
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for(int i=0; i<n; i++)
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for(int j=0; j<n; j++)
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a[i][j] = input.nextInt();
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for(int i=0; i<n; i++)
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for(int j=0; j<n; j++)
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b[i][j] = i+j;
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for (int i = 0; i < n; i++)
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{
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for (int j = 0; j < n; j++)
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{
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for (int k = 0; k < n; k++)
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{
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c[i][j] = c[i][j] + a[i][k] * b[k][j];
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}
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}
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}
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System.out.println("The Encoded matrix is:");
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for(int i=0; i<n; i++)
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{
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for(int j=0; j<n; j++)
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{
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System.out.print(c[i][j] + " ");
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}
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System.out.println();
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}
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input.close();
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}
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}
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/*
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Enter the base of squared matrices
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2
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Enter the elements of matrix to be encoded:
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1 5
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3 9
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The Encoded matrix is:
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5 11
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9 21
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Enter the base of squared matrices
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3
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Enter the elements of matrix to be encoded:
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1 2 3
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4 5 6
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7 8 9
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The Encoded matrix is:
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8 14 20
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17 32 47
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26 50 74
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