Блог пользователя eatmore

Автор eatmore, история, 4 года назад, По-английски

Looking at the scripts that Codeforces is loading, I found that it is using Evercookie. Evercookie is a script written by Samy Kamkar (the same guy who created Samy worm) which creates "supercookies", pieces of information that a website can store on the user's machine that are intentionally made difficult to get rid of. Supercookies are generally used for tracking, and the use of such technology would be understandable for an anti-privacy company such as Facebook, but why is Codeforces doing this?

  • Проголосовать: нравится
  • +242
  • Проголосовать: не нравится

»
4 года назад, # |
  Проголосовать: нравится +360 Проголосовать: не нравится

We need it to fight with cheaters only. This information can be useful for analyzing dishonest behavior. Every round we have dozens of people trying to break the rules — this helps to identify them. Each round I spend from an hour or more on the analysis of suspicious coincidences in solutions, the first places of troll accounts in div2, and so on. This is a big, though unnoticeable job.

»
4 года назад, # |
  Проголосовать: нравится +37 Проголосовать: не нравится

"anti-privacy company such as Facebook".. LMAO!

»
4 года назад, # |
  Проголосовать: нравится 0 Проголосовать: не нравится

Btw, how did you catch this thing? "By hand" or there is a tool for that? My ghostery plugin does not see it...

»
4 года назад, # |
  Проголосовать: нравится +24 Проголосовать: не нравится

Codeforces also uses browser fingerprinting.