Ruddy was part of the England squad for the European Championships in 2012 and Hughton believes that the goalkeeper has improved since then, making him a certainty to go to Brazil for the finals.
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Ruddy has kept 11 league clean sheets in 2013-14 and Hughton has no doubts that England can rely on him if selected.
"I might sound biased but John's been really good for us," Hughton told talkSPORT.
"He's kept a lot of clean sheets.
"We're sure Roy will make the right decision. We have every faith that, should John need to do a job for England, he'll be capable of doing that."
Ruddy's most recent clean sheet came at Carrow Road on Saturday as Norwich beat relegation rivals Sunderland 2-0 to move seven points clear of the bottom three.