A technique is disclosed for establishing a secure communication link
between a first computer and a second computer over a computer network.
Initially, a secure communication mode of communication is enabled at a
first computer without a user entering any cryptographic information for
establishing the secure communication mode of communication. Then, a
secure communication link is established between the first computer and a
second computer over a computer network based on the enabled secure
communication mode of communication. The secure communication link is a
virtual private network communication link over the computer network in
which one or more data values that vary according to a pseudo-random
sequence are inserted into each data packet.
