You're forgetting Alchemy, that's been confirmed as a stealth skill.
No, sir. I included Alchemy in my list. So if Speechcraft and Barter have been merged, Stealth would be: Alchemy, Sneak, Security, Speechcraft and Light Armor. Yes, I'm placing Light Armor under Stealth. I could very well be wrong; although, someone did post that Heavy Armor and Light Armor have been confirmed, and I don't think both Heavy Armor and Light Armor would be under Combat. Light Armor makes sense for Stealth, IMO.
Anyways, that's just 5 skills for Stealth. Perhaps the 6th is Archery, as deathcoffee has suggested?