  This paper presents a novel encryption-less algorithm to enhance security in
transmission of data in networks. The algorithm uses an intuitively simple idea
of a "jigsaw puzzle" to break the transformed data into multiple parts where
these parts form the pieces of the puzzle. Then these parts are packaged into
packets and sent to the receiver. A secure and efficient mechanism is provided
to convey the information that is necessary for obtaining the original data at
the receiver-end from its parts in the packets, that is, for solving the
"jigsaw puzzle". The algorithm is designed to provide information-theoretic
(that is, unconditional) security by the use of a one-time pad like scheme so
that no intermediate or unintended node can obtain the entire data. A
parallelizable design has been adopted for the implementation. An
authentication code is also used to ensure authenticity of every packet.
