Alright... my longer response:
Firstly, no, the shortcut you mention does not work in a browser, if yes, please record the screen and let us see.
Secondly, thank you for bringing back the conversation to shortcuts and evernote web. It's mind boggling that Evernote has still not done anything about it! Web interface is one of the nicest and cleanest designs of any online web based editor out there. I personally will routinely prefer to type my text in the browser, just because it's pleasant, clean, lets me concentrate without distractions..
Evernote, please implement at least the most basic keyboard shorcuts like new note, search, add tags, etc..
As for the encryption, it would be a wonderful addition to the web based version, too. For now only the desktop versions support encryption AFAIK.
Greetings,
Roman