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U.S. Secretary of Homeland Security Jeh Johnson will speak in San Francisco and Berkeley today on new challenges in the fight against terrorism, including cybercrime and the growing use of social media by terror groups both at home and abroad. 

Johnson will address "Security Challenges Confronting the Homeland" at San Francisco's Commonwealth Club at noon today. He will speak on the need for cybersecurity and progress against cybercrime. 

Gloria Duffy, the club's president and CEO as well as a former deputy assistant secretary of state, will act as moderator. 

At 6 p.m., Johnson will speak on "Threats to the Homeland" at the University of California International House at UC Berkeley. He is expected to outline new threats ranging from cyberterrorism to the Islamic State to homegrown terrorist groups. 

Immigration activists plan to protest outside the Berkeley event against what they call the Department of Homeland Security's "racist mass deportation policies." 

The protest, led by the group By Any Means Necessary, will gather outside International House at 5 p.m., according to organizers.  

Protest organizers allege that more people have been deported under the Obama Administration than under any other presidential term, and are calling for an end to deportations and detentions of undocumented immigrants. 

Johnson previously served as general counsel for the U.S. Department of Defense, where he oversaw legal aspects of counterterrorism policies, led reforms in the military commissions system and co-authored a report that led to the repeal of "Don't Ask, Don't Tell" in 2010, according to the Department of Homeland Security.