Re: Cracking Strings from URLs
Richard Kettlewell <[email protected]>
| Newsgroups | comp.misc |
|---|---|
| Organization | terraraq NNTP server |
| Message-ID | <[email protected]> |
[email protected] (Computer Nerd Kev) writes: > Rich <[email protected]> wrote: >> Computer Nerd Kev <[email protected]> wrote: >>> I got a copy of the PHP code. Turns out it's a "transposition >>> cipher" which adds different numbers to the ASCII value of each >>> character in sequence. >> >> Also called the Ceasar cipher: >> >> https://en.wikipedia.org/wiki/Ceasar_Cipher > > Almost, but unlike the description there, the number of shifted > positions varies for each character in the encrypted string, since the > shift length depends on the ASCII value of each character in the > password. Sounds like the Vigenère cipher, see https://en.wikipedia.org/wiki/Vigen%C3%A8re_cipher#Cryptanalysis for the basics of how to break it. > That it was also base64 encoded would've thrown a spanner in the > works, ??? it should be a non-issue, you only have to base64-decode it once. -- https://www.greenend.org.uk/rjk/