Encryption and decryption thunder, flashget, QQ tornado address

Thunder: // qufodhrwoi8vymxvzy44mta4mjiuy29twlo = starts with thunder: // and then a string of irregular and uncertain long strings. After my research, this actually applies the base64 encoding method. As long as base64 is used for encoding and decoding, the reality of thunder will be revealed in the world. PHP has built-in base64 function libraries. We can use PHP to encrypt and decrypt thunder. In the preceding example, the prefix Thunder: // is removed and base64 is decoded directly. Echo base64_decode ("qufodhrwoi8vagkuymfpzhuuy29tl2hhy2tsenrawg ="). The output result is aahttp. The above is the decoding method, it is easy to introduce the encoding method. After research, flash get and QQ tornado use the same method. The difference is that the prefix or additional things are different. The flashget encoding method is: "flashget ://". base64_encode ("[flashget] [flashget]") the QQ tornado download encoding method is: "qqdl ://". the base64_encode ("load address") decoding method can be easily introduced without further details.