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   private static final String KEY = "your-secret-key";        public String encrypt(String data) {        try {            Cipher cipher = Cipher.getInstance(ALGORITHM);            SecretKeySpec keySpec = new SecretKeySpec(KEY.getBytes(), "AES");            cipher.init(Cipher.ENCRYPT_MODE, keySpec);            byte[] encrypted = cipher.doFinal(data.getBytes());            return Base64.getEncoder().encodeToString(encrypted);        } catch (Exception e) {            throw new SecurityException("加密失败", e);        }    }        public String decrypt(String encryptedData) {        try {            Cipher cipher = Cipher.getInstance(ALGORITHM);            SecretKeySpec keySpec = new SecretKeySpec(KEY.getBytes(), "AES");            cipher.init(Cipher.DECRYPT_MODE, keySpec);            byte[] decrypted = cipher.doFinal(Base64.getDecoder().decode(encryptedData));            return new String(decrypted);        } catch (Exception e) {            throw new SecurityException("解密失败", e);        }    }}</code></pre>                <h2>3. 防SQL注入</h2>                <p>防止SQL注入攻击:</p>                <ul>                    <li>使用参数化查询</li>                    <li>输入验证和过滤</li>                    <li>使用ORM框架</li>                    <li>最小权限原则</li>                </ul>                <h2>4. XSS防护</h2>                <p>防止跨站脚本攻击:</p>                <ul>                    <li>输入输出过滤</li>                    <li>使用CSP策略</li>                    <li>设置HttpOnly Cookie</li>                    <li>使用XSS过滤器</li>                </ul>                <h2>5. CSRF防护</h2>                <p>防止跨站请求伪造:</p>                <ul>                    <li>使用CSRF Token</li>                    <li>验证Referer头</li>                    <li>SameSite Cookie属性</li>                    <li>双重提交Cookie</li>                </ul>                <h2>6. 安全监控与审计</h2>                <p>实时监控和审计系统安全:</p>                <ul>                    <li>日志记录与分析</li>                    <li>异常行为检测</li>                    <li>安全事件告警</li>                    <li>定期安全评估</li>                </ul>            </div>            <footer class="article-footer">                <div class="article-tags">                    <a href="#" class="article-tag">安全防护</a>                    <a href="#" class="article-tag">数据加密</a>                    <a href="#" class="article-tag">身份认证</a>                    <a href="#" class="article-tag">安全审计</a>                </div>            </footer>        </article>    </div></body></html> 
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