标签: feistel-cipher

对于一些学生来说,我需要用Java实现Feistel网络.

我从3个手动回合开始,像这样:

    // round 1
    int[] left1 = right;
    int[] right1 = new int[right.length];

    for(int i = 0; i < right.length; i++){
        right1[i] = left[i] ^ (right[i] ^ keys[0]);
    }

    // round 2
    int[] left2 = right1;
    int[] right2 = new int[right.length];

    for(int i = 0; i < right.length; i++){
        right2[i] = left1[i] ^ (right1[i] ^ keys[1]);
    }

    // round 3
    int[] left3 = right2;
    int[] right3 = new int[right.length];

    for(int i = 0; i < right.length; i++){
        right3[i] = …