APPLIED AND COMPUTATIONAL MATHEMATICS, cilt.6, sa.2, ss.258-264, 2007 (SCI-Expanded)
In this paper we present the steganographic approach to peer-to-peer systems with a modified algorithm. This gives the user a very high level of protection against being compelled to disclose its contents. Even the realization of the quantum computer cannot solve NP-hard problem in a polynomial time, a modified algorithm with steganographic use depending on Knapsack problem may make peer-to-peer systems secure.