Hello 3APA3A, --Monday, December 03, 2001, 8:06:14 PM, you wrote to peak@argo.troja.mff.cuni.cz: 3> It's not true. It's N = D(N,E(N,H(P))), not S=D(N,E(N,H(P))). So server 3> will always check E(N,S)=E(N,H(P)). typo. N = D(S,E(N,H(P))) -- ~/ZARAZA ���� �� �� ������ ����������, ��� �� ������� ������� ������ �����. (����)