Timing attack vulnerability

[moparisthebest]

This should not use Arrays.equals:
https://github.com/Robbert1/boot-stateless-auth/blob/master/src/main/java/com/jdriven/stateless/security/TokenHandler.java#L41

Instead it should use a constant time equality checking method like

public static boolean isEqual(byte[] a, byte[] b) {
    if (a.length != b.length) {
        return false;
    }

    int result = 0;
    for (int i = 0; i < a.length; i++) {
      result |= a[i] ^ b[i];
    }
    return result == 0;
}

Which is from https://codahale.com/a-lesson-in-timing-attacks/ which gives a good explanation of this exact vulnerability.

This seems like a popular article and code, I'd hate to see people using it in production in it's current vulnerable state, can you fix the article and code?