SOURCE

function encode(str, tKey) {
  if (!str) {
    return str
  };
  var xt = new Xxtea(tKey);
  var str = xt.xxtea_encrypt(str);
  return str;
}

function decode(tKey) {
  return function(str,xt = new Xxtea(tKey)){
    if (!str) return str;
    return xt.xxtea_decrypt(str);
  }
}

var t = new Date().getTime();
var tKey = `n+${t}`;
console.info(tKey);


var a = [
    {
      "sfzhm": "211011199103307196",
      "isMatch": 2,
      "xm": "徐根某"
    },
    {
      "sfzhm": "350723198605014333",
      "isMatch": 2,
      "xm": "叶英某"
    },
    {
      "sfzhm": "421182198707305605",
      "isMatch": 2,
      "xm": "邓小红"
    },
    {
      "sfzhm": "33030119720707448X",
      "isMatch": 1,
      "xm": "范聪燕"
    }
  ];
var b = JSON.stringify(a); 
console.info(b);
const res = encode(b,tKey);
console.info(res);

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<script src="https://code.jquery.com/jquery-3.5.0.js"></script>