Amid much speculation by private security analysts, the FBI stood by its claim this week that North Korea was responsible for the hack against Sony Pictures. Damian Dovarganes/AP hide caption

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The Rev. Martin Luther King makes a statement at the Justice Department in Washington on Dec. 1, 1964 after a meeting with FBI Director J. Edgar Hoover. Under Hoover's leadership, the FBI investigated King and his personal life for years. Bob Schutz/AP hide caption

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FBI Director James Comey says new encryption features allow people "to place themselves beyond the law." Alex Wong/Getty Images hide caption

itoggle caption Alex Wong/Getty Images