Staff team noticed that ~390 secure keys (~0.006% of sitewide) and 1 passkey were leaked in public internet. There are some scanners trying to make use of them without success, and caused the site to display "banned client" error message.

Staff team has investigated the issue and concluded that it is not a server-side leak. We currently think it may be some kind of proxy software (or other software/hardware that provide internet relay functionality) that records user access information.

We have already reset all leaked keys, if you have seen "banned client" error message for unknown reason, or found tracker reports "invalid key" without you manually change passkey/secure key, please check your local environment.