Washington (CNN) -- Department of Homeland Security Secretary Janet Napolitano will announce a new layer of airport security Friday, a senior administration official said.
The new security measures will supersede the measures put in place immediately after the attempted terror attack on Christmas Day 2009, the official said.
"These new, enhanced measures are part of a dynamic, threat-based aviation security system covering all passengers traveling by air to the United States," the official said. "To more effectively mitigate evolving terrorist threats, these measures utilize multiple, random layers of security, both seen and unseen and are tailored to intelligence about potential threats."
These new measures are a result of a review President Obama ordered after the December 25 attack.
The failed Christmas Day attack occurred when Nigerian Umar Farouk AbdulMutallab allegedly tried to blow up Northwest Airlines flight 253 from Amsterdam to Detroit.