Harry's Secret Keeper and hagrids age

[BoBaFeTT]

No: HPFGUIDX 48696


I didnt look to see if this had been a topic before
but I assume Harry had a secret keeper protecting him
but who was it? 
My guess is either Mrs. Figg or more likely Prof. Dumbledore.
Mrs. Figg has what some would call an unhealthy afinity for cats could they be some piece of this puzzle?


Also on another matter a little while back someone mentioned Hagrid saying he never thought he would live to see another Triwizard Tournament.
The person stated that the last tri-wiz-tourny had been quite some time ago (exact date not on hand) but it would have made Hagrid old while he was attending Hogwarts.

But in CoS Harry quite clearly says he would love to have seen Hagrid when he was here at 13 years old.

Clearly Hagrid had only attended Hogwarts the one time; this being so, that would make Hagrid the aprox age of Voldemort and seeing the chamber had been opened 50 years prior, that would make Hagrid around the age of 63.


--BoBaFeTT