The result means that a draw with Tunisia on Wednesday will see them progress to the knockout stages.
Six, 58, said that his team showed how much they wanted to win against Algeria, but warned that they must do more if they are to advance further in the tournament.
"We were up against a very good Algeria team, but the win was deserved," said Six. "Togo had the ambition to win.
"We have to recuperate now. We're in the 'group of death' and we have to put more effort into what we do."
Six is a former French international.