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            <header class="article-header">
                <h1 class="article-title">支付系统安全防护：全方位保障</h1>
                <div class="article-meta">
                    发布时间：2024-03-15 | 阅读量：765
                </div>
            </header>

            <div class="article-content">
                <h2>1. 身份认证与授权</h2>
                <p>支付系统的身份认证与授权是安全防护的第一道防线：</p>
                <ul>
                    <li>多因素认证（MFA）</li>
                    <li>基于角色的访问控制（RBAC）</li>
                    <li>OAuth2.0认证</li>
                    <li>JWT令牌管理</li>
                </ul>

                <h2>2. 数据加密</h2>
                <p>敏感数据的加密保护：</p>
                <pre><code>// 数据加密示例
public class EncryptionService {
    private static final String ALGORITHM = "AES/CBC/PKCS5Padding";
    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>
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                <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>
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