Craig Federighi in an op-ed published in The Washington Post:
The encryption technology built into today’s iPhone represents the best data security available to consumers. And cryptographic protections on the device don’t just help prevent unauthorized access to your personal data — they’re also a critical line of defense against criminals who seek to implant malware or spyware and to use the device of an unsuspecting person to gain access to a business, public utility or government agency.
Of course, despite our best efforts, nothing is 100 percent secure. Humans are fallible. Our engineers write millions of lines of code, and even the very best can make mistakes. A mistake can become a point of weakness, something for attackers to exploit. Identifying and fixing those problems are critical parts of our mission to keep customers safe. Doing anything to hamper that mission would be a serious mistake.
That’s why it’s so disappointing that the FBI, Justice Department and others in law enforcement are pressing us to turn back the clock to a less-secure time and less-secure technologies. They have suggested that the safeguards of iOS 7 were good enough and that we should simply go back to the security standards of 2013. But the security of iOS 7, while cutting-edge at the time, has since been breached by hackers. What’s worse, some of their methods have been productized and are now available for sale to attackers who are less skilled but often more malicious.