That's my blog. Happy to answer questions if anyone has any. Basically the situation hasn't changed since 2007, sad to say.
http://www.w3.org/2012/webcrypto/
If you are interested in helping to get S. Korea off Active-X, your help in getting WebCrypto developed and standardized is probably the best thing you can do (as a developer.)
(I work for Mozilla but not on DOMCrypt.)
The problem is that the law still requires these websites to use "firewall" and "anti-keylogger", so they just implemented those programs for Mac and Linux in NSAPI form. This is still far from "web standard", but at least they are trying. =(