encryption
Yahoo Chief Information Security Officer Bob Lord on encryption: "Yes, it's used by terrorists. It's also used by people who are looking to voice their opinions on issues and to save lives." Yahoo hide caption
FBI Director James Comey testifies March 1 before the House Judiciary Committee on the encryption of the iPhone belonging to one of the San Bernardino attackers. Nicholas Kamm/AFP/Getty Images hide caption
FBI Executive Assistant Director for Science and Technology Amy Hess (from left) testifies on encryption Tuesday before a House panel, alongside the New York City Police Department's Thomas Galati and Indiana State Police Office Capt. Charles Cohen. Manuel Balce Ceneta/AP hide caption
The official FBI seal is seen on an iPhone camera screen outside the agency's headquarters. With help from a third party, the FBI managed to unlock the iPhone used by one of San Bernardino shooters. Chip Somodevilla/Getty Images hide caption
The Next Apple-FBI Question: Who Can Know How The iPhone Was Hacked?
FBI Director James Comey says the third-party technique used to unlock the San Bernardino iPhone "works on a narrow slice of phones." Andrew Harnik/AP hide caption
Senate Intelligence Committee Vice Chairman Dianne Feinstein, D-Calif., and Chairman Richard Burr, R-N.C., have introduced encryption legislation. Alex Brandon/AP hide caption
New York police officers monitor a pro-encryption demonstration at an Apple store in February. Julie Jacobson/AP hide caption
A protester supporting Apple in its battle against the FBI holds up an iPhone that reads "No Entry" outside an Apple store in New York on Feb. 23. Bryan Thomas/Getty Images hide caption
The 227-year-old law at the center of the Apple-FBI debate has withstood several challenges, including at the Supreme Court. Xinhua News Agency/Getty Images hide caption
The FBI wants to access data on a password-protected phone used by one of the San Bernardino shooters. Mandel Ngan/AFP/Getty Images hide caption
Apple CEO Tim Cook appears Sept. 9, 2015, in San Francisco to unveil the latest iterations of the company's smartphone. Stephen Lam/Getty Images hide caption
FBI Director James Comey testifies that Congress should require digital encryption programs to allow access by law enforcement. The issue pits privacy against public safety. Carolyn Kaster/AP hide caption