Apple issued a stark iCloud security threat warning on its support page on Tuesday, indicating that its venerable cloud service has been under organized attack from malicious sources. The warning basically says not to key in your Apple ID or other credentials on a website that presents with a security certificate warning in your browser.
The company didn't mention China in the posting, but a bunch of Apple device users there have been clamoring at the local blogosphere that they are seeing certificate warnings when they try to log into iCloud, indicating a "man in the middle" type of attack, aiming to snatch your ID and password.
Some even suspect that the Chinese government is behind these malicious intermediary sign-ins, which would surprise exactly nobody. This is why Apple issued the iCloud sign-in warning, posting pretty pictures of how the certificate warning looks like in each browser. We'd listen, especially if you are a celebrity that has a bunch of fun pics stored in their iPhone or iPad. Here's the full text of Apple's iCloud security bit: