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PHP 加密全指南:从必知原理到避坑实战

  • 2026-08-18 23:11:30
PHP 加密全指南:从必知原理到避坑实战

PHP 加密全指南：从必知原理到避坑实战

加密到底能干嘛？说实话，以前我也不太当回事。机密性，数据被截了也是乱码，抓包的人干瞪眼。完整性，改没改一验就知道。身份认证堵住中间人攻击。不可否认性在金融系统里简直是救命的东西。前年一个做电商的朋友，数据库密码明文存着，被拖库后用户全平台被撞，赔了一百多万，公司差点没死在上面。
PHP里别自己瞎折腾。password_hash()自动加盐，彩虹表没用。我第一次还傻乎乎自己写加盐逻辑，写了一晚上，结果发现它自带，当时想抽自己。openssl_encrypt()选AES-256-GCM，快，大文件也不喘气。hash_hmac()做API签名校验，之前有个项目接口被撞好几万次，半夜运维打电话骂人，加上签名才消停。对称加密一把钥匙，快但怕丢；非对称公私钥分离，安全但慢得想砸键盘。怎么说呢，实践中都是配合着用。不对，应该说，跟HTTPS的TLS握手一个路子。
千万别踩坑。MD5、SHA1存密码，现在GPU一秒几十亿次哈希，等于裸奔。自己发明算法更是找死。我见过一个团队把密钥硬编码在代码里，代码泄漏那天，技术总监蹲在机房地上哭，真事。还有只加密不校验签名，数据被改了都不知道。前阵子一家金融科技公司用HTTP传用户数据，被罚了四千万，CTO进去了。选对函数，绕开这些坑，慢慢就上手了。你看，我刚刚还在写加密类，突然想起来，密钥还没生成……
#PHP #PHP安全 #加密技术 #避坑指南 #干货#Web安全 #数据加密 #后端开发

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  137. /yingpanguazai/ssd/ssd1/www/f.mffb.com.cn/vendor/topthink/think-template/src/template/driver/File.php ( 2.41 KB )
  138. /yingpanguazai/ssd/ssd1/www/f.mffb.com.cn/vendor/topthink/think-template/src/template/contract/DriverInterface.php ( 0.86 KB )
  139. /yingpanguazai/ssd/ssd1/www/f.mffb.com.cn/runtime/temp/067d451b9a0c665040f3f1bdd3293d68.php ( 11.98 KB )
  140. /yingpanguazai/ssd/ssd1/www/f.mffb.com.cn/vendor/topthink/think-trace/src/Html.php ( 4.42 KB )
  1. CONNECT:[ UseTime:0.001180s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001504s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000710s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000751s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001381s ]
  6. SELECT * FROM `set` [ RunTime:0.000557s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001573s ]
  8. SELECT * FROM `article` WHERE `id` = 507761 LIMIT 1 [ RunTime:0.000975s ]
  9. UPDATE `article` SET `lasttime` = 1787309758 WHERE `id` = 507761 [ RunTime:0.015260s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000654s ]
  11. SELECT * FROM `article` WHERE `id` < 507761 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000994s ]
  12. SELECT * FROM `article` WHERE `id` > 507761 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000944s ]
  13. SELECT * FROM `article` WHERE `id` < 507761 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002686s ]
  14. SELECT * FROM `article` WHERE `id` < 507761 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002545s ]
  15. SELECT * FROM `article` WHERE `id` < 507761 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002910s ]
0.200523s