sessionStorage を正しく使用して機密データを保護する方法

// 加密函数
function encryptData(data, key) {
    var encryptedData = CryptoJS.AES.encrypt(data, key);
    return encryptedData.toString();
}

// 解密函数
function decryptData(encryptedData, key) {
    var decryptedData = CryptoJS.AES.decrypt(encryptedData, key);
    return decryptedData.toString(CryptoJS.enc.Utf8);
}

// 将敏感信息加密后存储到sessionStorage中
var sensitiveInfo = {
    username: "John",
    password: "password123"
};

var encryptedInfo = encryptData(JSON.stringify(sensitiveInfo), "mySecretKey");
sessionStorage.setItem("encryptedInfo", encryptedInfo);

// 从sessionStorage中取出加密后的敏感信息并解密
var encryptedInfo = sessionStorage.getItem("encryptedInfo");
var decryptedInfo = decryptData(encryptedInfo, "mySecretKey");
console.log(JSON.parse(decryptedInfo));

// 将敏感信息存储到sessionStorage中，并设置过期时间为1小时
var sensitiveInfo = {
    username: "John",
    password: "password123"
};

var encryptedInfo = encryptData(JSON.stringify(sensitiveInfo), "mySecretKey");
var expirationTime = new Date().getTime() + (60 * 60 * 1000); // 设置过期时间为1小时
sessionStorage.setItem("encryptedInfo", JSON.stringify({
    data: encryptedInfo,
    expiration: expirationTime
}));

// 从sessionStorage中取出敏感信息，并检查是否已过期
var storedInfo = sessionStorage.getItem("encryptedInfo");
if (storedInfo) {
    var decryptedInfo = decryptData(JSON.parse(storedInfo).data, "mySecretKey");
    var expirationTime = JSON.parse(storedInfo).expiration;
    if (expirationTime > new Date().getTime()) {
        console.log(JSON.parse(decryptedInfo));
    } else {
        console.log("敏感信息已过期");
    }
} else {
    console.log("未找到敏感信息");
}