用于加密Java的矩阵元素交换 [英] Matrix element swapping for encryption Java
问题描述
我需要编写一个程序来加密和解密给定的纯文本。输入将是一个没有空格的字符串。程序应该读取并将字符串存储为方形矩阵，矩阵中的每个元素都是一个字符。因此，输入字符串中的字符数只能是完美的正方形。如果不是，程序应该抛出错误。
加密技术：
输入：abcdefghi
abc
def
ghi
交换行将产生以下结果
ghi
def
abc
加密文本然后是ghidefabc
因此，对于3行的矩阵，交换行1和2.对于具有4行的矩阵，交换行1和4，交换行2和3.对于具有5行的矩阵，交换行1和5，交换行2和4，依此类推。程序应该打印纯文本输入字符串。打印加密文本。然后打印解密的文本。 [提示：加密的反向是解密，你可以只为这两个进程使用一种方法。这种密码称为对称密码]
样本输出：
纯文本：welcometosanjose
加密文字：joseosanometwelc
解密文字：welcometosanjose
I need to write a program to encrypt and decrypt a given plain text. The input will be a string without spaces. The program should read and store the string as a square matrix, with each element in the matrix being one character. Hence the number of characters in the input string can only be perfect squares. If they are not, the program should throw an error.
Encryption technique:
Input: abcdefghi
a b c
d e f
g h i
Exchanging rows will result in the following
g h i
d e f
a b c
The encrypted text then is ghidefabc
Therefore, For a matrix with 3 rows, swap rows 1 and 2. For a matrix with 4 rows, swap rows 1 and 4, swap rows 2 and 3. For a matrix with 5 rows, swap rows 1 and 5, swap rows 2 and 4 and so on. The program should print the input string which is plain text. Print the encrypted text. And then print the decrypted text. [Hint: Reverse of encryption is decryption and you may use just one method for both the processes. Such a cipher is called symmetric cipher]
Sample output:
Plain Text: welcometosanjose
Encrypted text: joseosanometwelc
Decrypted text: welcometosanjose
推荐答案
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