The FBI has started telling Congress how it hacked the iPhone https://t.co/KUwpDfHIsL pic.twitter.com/t6FgdnN8SQ — Ben Pershing (@benpershing) April 6, 2016

The briefings of Feinstein and Burr are likely no coincidence -- both senators are working on an anti-encryption bill that would limit the technology's usage in consumer products like the iPhone. How the FBI's unlocking of the iPhone 5c and its meetings with the two senators will play into the bill remains to be seen, but Feinstein at the very least supports the FBI on its position of secrecy. Last week, she said that the agency shouldn't have to tell Apple about the methods it used to hack into the iPhone 5c.

Apple, for its part, is rightfully curious as to how the FBI managed to bypass the passcode screen lock that the company encourages all users to enable. The company likely wants to know if the exploit the FBI uses is unique to the iPhone 5c or if it can be used on other devices, including the newer iPhone 6 and 6s devices that have stronger encryption standards. It doesn't seem like those details will be forthcoming any time soon, however.