From Bloomberg:

The dispute is the latest flare-up that pits the federal government against the nation’s leading technology companies since National Security Agency contractor Edward Snowden disclosed last year the extent of U.S. snooping on phone and Internet communications — and how companies cooperated.

U.S. Justice Department and FBI officials are trying to understand how the new Apple and Google Android systems work and how the companies could change the encryption to make it accessible when court ordered. Their requests to the companies may include letters, personal appeals or congressional legislation, said a federal law official who requested anonymity to discuss the sensitive issue.