Inherently large traceability of broadcast encryption scheme
Kaoru Kurosawa, Takuya Yoshida, Y. Desmelt · 2002
We say that a broadcast encryption scheme is a (c, N)-broadcast exclusion scheme (BEx) if a center can exclude c or less users among N users. We present an efficient (c, N)-BEx which has inherently large traceability by showing a new construction of cover free families.