The cashed-up Giants are eyeing some of the younger stars of the AFL and Murphy, out of contract at the end of 2011, is believed to be front and centre in their thinking.
But Judd said he hadn't spoken to his younger teammate and it was up to the club and player to work out a deal.
"You know with two new clubs coming into the competition there's going to be constant rumours about various players heading up there," Judd said from Visy Park on Saturday morning.
"We place a huge value on Marc's worth to the team and he knows that and fingers crossed he's a Carlton player for life."
Murphy's contract with the Blues, like that of Collingwood and its host of out-of-contract stars, could be a source of regular debate throughout 2011 should player and club fail to come to an agreement. But Judd said he wasn't worried about his club facing a situation similar to that of Geelong and Gary Ablett last season.
"It's not my place to comment or put pressure publicly on individual players and their contracts," Judd said.
"That's actually things for them to work out with the club."
Judd is more concerned with seeing his side advance beyond the first week of the finals next year.
After successive elimination final defeats in 2009 and 2010 - both interstate - chief executive Greg Swann hinted the Blues may need to see significant improvement next season for coach Brett Ratten to earn a contract extension.
Judd believes the man in charge has got better in his time at the helm, and that his teammates are also getting to the stage where they can take the next step.
"You know he's [Ratten] very clear on what he wants from the playing group," Judd said.
"A lot of our players are now getting to that age where they've played three or four seasons of footy and have the same number of pre-seasons under their belt, and that's usually the age where players start to really make significant steps.
"It'd be great to win a final. It'd be great for our Melbourne supporters to get to see us play a home final."
Judd said the Blues wouldn't put ceilings on what they were capable of in 2011, but the pain of those recent finals losses continues to drive the hard yards being done over the summer months.
"We've been less than a kick away the last two years ... but every year the competition gets better and better, so if you're standing still you're effectively going backwards," Judd said.
"We know that and the boys have been working really hard and are confident that we'll improve enough this year to get some good results."
