U.S. President Barack Obama is seeking the help of tech companies to combat terror threats, which he described as entering a new phase.Obama’s remarks could put into sharp focus again the demand by law enforcement agencies for tech companies to provide ways for the government to be able to access encrypted communications.In an address late Sunday from the Oval Office, Obama said he “would urge hi-tech and law enforcement leaders to make it harder for terrorists to use technology to escape from justice.”