东方财富SRC

CTFcode为CTF比赛人员、程序员提供20多种常用编码，如base家族编码、莫尔斯电码，20多种古典密码学，如仿射密码、栅栏密码、培根密码等，以及10多种杂项工具，如XXencode、UUencode等。

Base64,DES,AES,RSA,BASE16,Hex等常规加密/解密工具。独创数据检查技术全自动识别结果。提供精准的处理建议。

VirusTotal

创立18年的md5解密网站，支持md5解密，sha1解密等多种类型实时解密和破解。数据库大，使用3PB硬盘仓库。成功率高，如果本站解密不了，那就没有办法了。

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Home | Zero Day Initiative

Free domain research tool to discover hosts related to a domain. Find visible hosts from the attackers perspective for Red and Blue Teams.