The top Democrat on the House Intelligence Committee is using the terrorist attack in Brussels to remind Americans that encryption technology may have played a role, even if no one is sure what that role happened to be.

“In the wake of these attacks, we here in the U.S. and our allies across Europe must be on alert for possible copy-cat attackers who activate in the wake of these bombings,” ranking Democrat Rep. Adam Schiff, D-Calif., said in a statement.