Perfectly Secure Patterns

• Each pattern, P = (1 , ..., m ) is dlist(P)

• dlist(P) can be formed inductively:

  • If m = 1, dlist(P) = dlist(1)
  • Otherwise dlist(P) is formed by concatenating the head of dlist(m) to the tale of dlist(P ' ) where :
  • dlist(P ') = (1 , ..., m-1 )