Among the groups signing the letter to Obama were the American Civil Liberties Union, the Center for Democracy and Technology, the Electronic Frontier Foundation and the New America Foundation’s Open Technology Institute. Security experts signing the letter included Ronald Rivest, a computer science professor at the Massachusetts Institute of Technology; Bruce Schneier, a fellow at the Berkman Center for Internet and Society at Harvard University; and Dan Wallach, a computer science professor at Rice University.

Source: Groups urge Obama to oppose cyberthreat sharing bills | PCWorld