The quest for an unbreakable phone is 'impossible,' says Apple

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Apple is pushing hard to make its phones more secure, but the quest for perfect security will never be met.

"Getting to unbreakable is impossible," Apple engineers told CNNMoney, though there had been reports that the company was reportedly working toward that goal.

The engineers said that the company is constantly improving its security as hackers get more sophisticated, but that no company writes perfect code without some vulnerabilities.

That's one reason the company fought so hard against the government's request to create special software that would help them access the iPhone used by the San Bernardino terrorist -- a move that Apple said would ultimately weaken security.

The FBI ultimately was able to access that phone without Apple's assistance. But it has not disclosed the method or who helped do it.

Apple engineers think the government should share what they've learned.

"We would love to know what this mechanism is so that we could address it and fix it in our product... it goes without saying normal practices are to let the manufacturer know so it's fixed for all the customers," said the Apple engineer.

The Department of Justice declined to comment.