java - 使字符串不可读 [英] java - make string unreadable

问题描述

我需要一个尽可能短而快的代码来将String更改为不可读的（对于人类而言），并使其再次可读。这一切都需要在java中发生。

I need an as short and fast as possible code to change a String to something unreadable (for humans that is), and also to make it readable again. It all needs to happen in java.

这样的事情：

encrypt("test");

会产生如下结果：

ôT¿ÄÜTV CÁˆ"5="ËÂÀœššbÀß{¡ä³

和

decrypt("ôT¿ÄÜTV CÁˆ"5 1="ËÂÀœššbÀß{¡ä³");

将再次导致原始

test

我应该去哪个方向，是否有课程那可以帮我吗？我不是指像Base68Encryption或其他任何东西，我的意思是一个真正难以理解的文本，我可以安全地通过互联网发送。

What direction should I go, are there any classes that can do this for me? I don't mean something like Base68Encryption or whatever it might be called, I mean a true unreadable text that I can safely send over the internet.

推荐答案

这是使用真正加密的一个非常简短的例子。它是128位AES，非常安全 - 在任何想象中都无法读取。

Here is a very short example of using true encryption. It's 128 bit AES, which is farily secure - certainly not readable by any stretch of the imagination.

它生成一个随机密钥，因此每次运行都会有所不同。您需要在两个以某种方式交换数据的程序之间共享密钥。

It generates a random key, so it would be different on each run. You would need to share they key between the two programs exchanging data somehow.

private static final String ENCRYPTION_ALGORITHM = "AES/ECB/PKCS5Padding";
private static final SecureRandom RANDOM = new SecureRandom();

public static void main(String[] args) throws UnsupportedEncodingException, GeneralSecurityException {
    final KeyGenerator keyGen = KeyGenerator.getInstance(ENCRYPTION_ALGORITHM.substring(0, ENCRYPTION_ALGORITHM.indexOf('/')));
    keyGen.init(128, RANDOM);
    final SecretKey key = keyGen.generateKey();
    final String s = "My topsecret string";
    System.out.println(s);
    final Cipher encryption = getCipher(key, Cipher.ENCRYPT_MODE);
    final String enc = DatatypeConverter.printBase64Binary(encryption.doFinal(s.getBytes("UTF-8")));
    System.out.println(enc);
    final Cipher decryption = getCipher(key, Cipher.DECRYPT_MODE);
    final String dec = new String(decryption.doFinal(DatatypeConverter.parseBase64Binary(enc)), "UTF-8");
    System.out.println(dec);
}

private static Cipher getCipher(final Key key, final int mode) throws GeneralSecurityException {
    final Cipher cipher = Cipher.getInstance(ENCRYPTION_ALGORITHM);
    cipher.init(mode, key, RANDOM);
    return cipher;
}

输出：

My topsecret string
ip4La5KUBJGTTYenoE920V5w0VBHwALv4fp3qyLTY9o=
My topsecret string

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